{"id":3912,"date":"2026-02-09T06:19:33","date_gmt":"2026-02-09T06:19:33","guid":{"rendered":"https:\/\/getw9.tax\/blog\/?p=3912"},"modified":"2026-02-09T06:19:34","modified_gmt":"2026-02-09T06:19:34","slug":"irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide","status":"publish","type":"post","link":"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/","title":{"rendered":"IRS TIN Matching 101: When to Use It, What It Catches, What It Doesn\u2019t (2026 Guide)"},"content":{"rendered":"\n<p>If you\u2019ve ever received a CP2100 notice, you already know the pain: a vendor name\/TIN mismatch turns into follow-ups, documentation, and sometimes backup withholding. The frustrating part is most of these issues are preventable.<\/p>\n\n\n\n<p>That\u2019s what <strong>IRS TIN Matching<\/strong> is for.<\/p>\n\n\n\n<p>TIN Matching helps you validate a vendor\u2019s <strong>name + taxpayer identification number (TIN)<\/strong> combination <em>before<\/em> you file information returns like 1099s. It doesn\u2019t replace collecting a W-9 it complements it.<\/p>\n\n\n\n<p>This guide breaks down:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>when to use TIN Matching (and when not to),<\/li>\n\n\n\n<li>what it actually catches,<\/li>\n\n\n\n<li>what it doesn\u2019t catch (so you don\u2019t get a false sense of security),<\/li>\n\n\n\n<li>and a simple workflow you can adopt in AP.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#What_is_IRS_TIN_Matching\" >What is IRS TIN Matching?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#TIN_Matching_vs_W-9_whats_the_difference\" >TIN Matching vs W-9: what\u2019s the difference?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#W-9_collection\" >W-9 (collection)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#TIN_Matching_validation\" >TIN Matching (validation)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#When_should_you_use_TIN_Matching\" >When should you use TIN Matching?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#1_Before_1099_season_the_obvious_one\" >1) Before 1099 season (the obvious one)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#2_When_onboarding_vendors_youll_likely_1099\" >2) When onboarding vendors you\u2019ll likely 1099<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#3_When_a_vendor_updates_their_legal_name_or_entity\" >3) When a vendor updates their legal name or entity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#4_After_you_receive_a_CP2100CP2100A_notice_damage_control\" >4) After you receive a CP2100\/CP2100A notice (damage control)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#5_After_major_vendor_master_cleanup\" >5) After major vendor master cleanup<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#When_you_should_NOT_use_TIN_Matching\" >When you should NOT use TIN Matching<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#What_TIN_Matching_catches\" >What TIN Matching catches<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#1_Typos_and_transposed_digits\" >1) Typos and transposed digits<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#2_%E2%80%9CDBA%E2%80%9D_vs_legal_entity_name_errors\" >2) \u201cDBA\u201d vs legal entity name errors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#3_Nicknames_shortened_names_or_missing_middle_initials_for_individuals\" >3) Nicknames, shortened names, or missing middle initials (for individuals)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#4_Wrong_TIN_type_used\" >4) Wrong TIN type used<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#5_Stale_vendor_records\" >5) Stale vendor records<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#What_TIN_Matching_does_NOT_catch\" >What TIN Matching does NOT catch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#IRS_TIN_Matching_options_Interactive_vs_Bulk\" >IRS TIN Matching options (Interactive vs Bulk)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Interactive_TIN_Matching\" >Interactive TIN Matching<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Bulk_TIN_Matching\" >Bulk TIN Matching<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#A_simple_%E2%80%9Csafe%E2%80%9D_workflow_for_AP_teams\" >A simple \u201csafe\u201d workflow for AP teams<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Step_1_Request_the_W-9_before_the_first_payment\" >Step 1: Request the W-9 before the first payment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Step_2_Standardize_how_you_store_the_vendor_name\" >Step 2: Standardize how you store the vendor name<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Step_3_Validate_the_record_before_filing_1099s\" >Step 3: Validate the record before filing 1099s<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Step_4_Fix_mismatches_with_a_clean_vendor_message\" >Step 4: Fix mismatches with a clean vendor message<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Step_5_Keep_an_audit_trail\" >Step 5: Keep an audit trail<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Decision_tree_Do_I_need_to_run_TIN_Matching\" >Decision tree: Do I need to run TIN Matching?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Where_GetW9_fits_without_pretending_it_does_everything\" >Where GetW9 fits (without pretending it does everything)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Common_mistakes_that_create_nameTIN_mismatches\" >Common mistakes that create name\/TIN mismatches<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#FAQs\" >FAQs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Is_TIN_Matching_required\" >Is TIN Matching required?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Does_TIN_Matching_replace_collecting_a_W-9\" >Does TIN Matching replace collecting a W-9?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#How_often_should_I_run_TIN_Matching\" >How often should I run TIN Matching?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#If_I_received_a_CP2100_notice_what_should_I_do_first\" >If I received a CP2100 notice, what should I do first?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Will_TIN_Matching_catch_vendor_fraud\" >Will TIN Matching catch vendor fraud?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/#Takeaway\" >Takeaway<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_IRS_TIN_Matching\"><\/span>What is IRS TIN Matching?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>TIN Matching<\/strong> is an IRS e-Services tool that checks whether the <strong>payee name + TIN<\/strong> you have on file matches IRS records <em>before<\/em> you submit information returns.<\/p>\n\n\n\n<p>A \u201cTIN\u201d can be:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>EIN<\/strong> (Employer Identification Number)<\/li>\n\n\n\n<li><strong>SSN<\/strong> (Social Security Number)<\/li>\n\n\n\n<li><strong>ITIN<\/strong> (Individual Taxpayer Identification Number)<\/li>\n<\/ul>\n\n\n\n<p>In plain terms: <strong>TIN Matching reduces the odds you\u2019ll file a 1099 with bad vendor data<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"TIN_Matching_vs_W-9_whats_the_difference\"><\/span>TIN Matching vs W-9: what\u2019s the difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>These get mixed up constantly, so here\u2019s the clean separation:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"W-9_collection\"><\/span>W-9 (collection)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A W-9 is the vendor\u2019s statement of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>their legal name,<\/li>\n\n\n\n<li>entity type,<\/li>\n\n\n\n<li>TIN,<\/li>\n\n\n\n<li>and certification.<\/li>\n<\/ul>\n\n\n\n<p>It\u2019s the \u201csource of truth\u201d you collect from the vendor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"TIN_Matching_validation\"><\/span>TIN Matching (validation)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>TIN Matching is what <em>you<\/em> use to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>validate the <strong>name\/TIN combination<\/strong>,<\/li>\n\n\n\n<li>before filing 1099s,<\/li>\n\n\n\n<li>and reduce mismatch notices later.<\/li>\n<\/ul>\n\n\n\n<p><strong>Bottom line:<\/strong><br><strong>Collect W-9s first. Then TIN match your records before you file.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_should_you_use_TIN_Matching\"><\/span>When should you use TIN Matching?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Here are the moments when it actually pays off:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Before_1099_season_the_obvious_one\"><\/span>1) Before 1099 season (the obvious one)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Run TIN Matching <strong>before<\/strong> you generate or file your 1099s. This lets you fix mismatches while you still have time.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_When_onboarding_vendors_youll_likely_1099\"><\/span>2) When onboarding vendors you\u2019ll likely 1099<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If your business regularly pays contractors, freelancers, agencies, or vendors that could receive a 1099, it\u2019s smart to validate early not at year-end.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_When_a_vendor_updates_their_legal_name_or_entity\"><\/span>3) When a vendor updates their legal name or entity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If a vendor says \u201cWe changed our name\u201d or \u201cWe\u2019re now an LLC,\u201d you should treat that as a data-risk moment. Collect an updated W-9 and validate your record.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_After_you_receive_a_CP2100CP2100A_notice_damage_control\"><\/span>4) After you receive a CP2100\/CP2100A notice (damage control)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If the IRS flags a mismatch, your priority is response and documentation. TIN Matching won\u2019t erase that notice but it helps you prevent repeats by correcting your vendor master data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_After_major_vendor_master_cleanup\"><\/span>5) After major vendor master cleanup<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If you\u2019re doing a vendor master overhaul (deduping, fixing DBAs, standardizing legal names), validating the updated records is a smart final step.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_you_should_NOT_use_TIN_Matching\"><\/span>When you <strong>should NOT<\/strong> use TIN Matching<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>TIN Matching is useful, but it\u2019s not magic. Don\u2019t waste time using it for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Non-US vendors<\/strong> (they generally need W-8 forms, not W-9)<\/li>\n\n\n\n<li>Vendors you\u2019ll never issue 1099s to (for example, many corporations or vendors paid by credit card\/processors)<\/li>\n\n\n\n<li>Bank account verification (TIN Matching does <strong>not<\/strong> verify bank details)<\/li>\n\n\n\n<li>Address validation (it does <strong>not<\/strong> verify addresses)<\/li>\n\n\n\n<li>Entity classification compliance (it does <strong>not<\/strong> confirm whether the vendor is truly an S-Corp vs partnership, etc.)<\/li>\n<\/ul>\n\n\n\n<p>Use it where it reduces real risk: <strong>name\/TIN mismatch on reportable payments.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_TIN_Matching_catches\"><\/span>What TIN Matching catches <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Most mismatches are not \u201cfraud\u201d they\u2019re just messy vendor data. TIN Matching helps catch:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Typos_and_transposed_digits\"><\/span>1) Typos and transposed digits<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>One digit off in an EIN is enough to trigger mismatch problems later.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E2%80%9CDBA%E2%80%9D_vs_legal_entity_name_errors\"><\/span>2) \u201cDBA\u201d vs legal entity name errors<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Vendors often write a <strong>business name \/ DBA<\/strong> when the IRS record is tied to a different legal name.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Nicknames_shortened_names_or_missing_middle_initials_for_individuals\"><\/span>3) Nicknames, shortened names, or missing middle initials (for individuals)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>For individuals, small name differences can matter depending on how IRS records are set.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Wrong_TIN_type_used\"><\/span>4) Wrong TIN type used<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Example: vendor gives EIN, but their payments should be tied to an individual\/SSN in the way they report.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Stale_vendor_records\"><\/span>5) Stale vendor records<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Vendor got married, changed business name, changed entity, or corrected their info \u2014 but your system still has the old combination.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_TIN_Matching_does_NOT_catch\"><\/span>What TIN Matching does <strong>NOT<\/strong> catch <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>This is the part people ignore then wonder why they still have problems.<\/p>\n\n\n\n<p>TIN Matching does <strong>not<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verify the vendor is eligible for a specific tax classification<\/li>\n\n\n\n<li>Tell you whether you \u201cshould\u201d issue a 1099<\/li>\n\n\n\n<li>Confirm the vendor is US vs non-US (that\u2019s a form decision: W-9 vs W-8)<\/li>\n\n\n\n<li>Validate addresses (use address validation for that)<\/li>\n\n\n\n<li>Verify bank ownership or prevent ACH fraud<\/li>\n\n\n\n<li>Replace W-9 collection and certification<\/li>\n\n\n\n<li>Replace your CP2100\/B-Notice response process<\/li>\n<\/ul>\n\n\n\n<p><strong>Think of it as a filter. Not a shield.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"IRS_TIN_Matching_options_Interactive_vs_Bulk\"><\/span>IRS TIN Matching options (Interactive vs Bulk)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The IRS generally offers two modes:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interactive_TIN_Matching\"><\/span>Interactive TIN Matching<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Best for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>onboarding a handful of vendors,<\/li>\n\n\n\n<li>spot checks,<\/li>\n\n\n\n<li>smaller AP teams.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bulk_TIN_Matching\"><\/span>Bulk TIN Matching<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Best for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>pre-1099 season validation,<\/li>\n\n\n\n<li>vendor master cleanup projects,<\/li>\n\n\n\n<li>large vendor lists.<\/li>\n<\/ul>\n\n\n\n<p>If you\u2019re dealing with hundreds (or thousands) of vendors, Bulk is the realistic option.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_simple_%E2%80%9Csafe%E2%80%9D_workflow_for_AP_teams\"><\/span>A simple \u201csafe\u201d workflow for AP teams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>You don\u2019t need a complicated compliance program. You need a repeatable workflow.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_1_Request_the_W-9_before_the_first_payment\"><\/span>Step 1: Request the W-9 before the first payment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This is the easiest point to enforce compliance without drama.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_2_Standardize_how_you_store_the_vendor_name\"><\/span>Step 2: Standardize how you store the vendor name<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Use a rule like:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Legal name (exactly as on W-9)<\/strong> goes in the legal name field<\/li>\n\n\n\n<li>DBA goes in a separate DBA field (if your system has it)<\/li>\n\n\n\n<li>Never mix the two<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_3_Validate_the_record_before_filing_1099s\"><\/span>Step 3: Validate the record before filing 1099s<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Run TIN Matching during your pre-1099 checklist window (not the week of filing).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_4_Fix_mismatches_with_a_clean_vendor_message\"><\/span>Step 4: Fix mismatches with a clean vendor message<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Don\u2019t accuse. Don\u2019t ramble. Just be clear and neutral.<\/p>\n\n\n\n<p><strong>Example message (vendor-friendly):<\/strong><br>\u201cHi, we\u2019re updating our tax records for year-end reporting. The name\/TIN combination we have doesn\u2019t match IRS records. Can you confirm your legal name and TIN by submitting an updated W-9 using this link?\u201d<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_5_Keep_an_audit_trail\"><\/span>Step 5: Keep an audit trail<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If you ever get questioned internally (or in an audit), you want to show:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>what you requested,<\/li>\n\n\n\n<li>what the vendor submitted,<\/li>\n\n\n\n<li>when it was submitted,<\/li>\n\n\n\n<li>and what changed.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Decision_tree_Do_I_need_to_run_TIN_Matching\"><\/span>Decision tree: Do I need to run TIN Matching?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Use this as your weekly asset (turn it into a one-page graphic later):<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Are you paying a US person\/entity for reportable payments?<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No \u2192 Don\u2019t use TIN Matching.<\/li>\n\n\n\n<li>Yes \u2192 continue.<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Do you have a W-9 on file?<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No \u2192 Request W-9 before paying.<\/li>\n\n\n\n<li>Yes \u2192 continue.<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>Is this vendor likely to receive a 1099?<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No \/ unsure \u2192 Still keep W-9 clean; validate before filing season.<\/li>\n\n\n\n<li>Yes \u2192 continue.<\/li>\n<\/ul>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>Are you within your pre-1099 window or doing onboarding at scale?<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Yes \u2192 Run TIN Matching (bulk if many).<\/li>\n\n\n\n<li>No \u2192 Schedule it as part of your monthly\/quarterly vendor audit.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_GetW9_fits_without_pretending_it_does_everything\"><\/span>Where GetW9 fits (without pretending it does everything)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>TIN Matching is about validation. <strong>GetW9 is about getting clean, consistent W-9 data into your system<\/strong> so validation is actually usable.<\/p>\n\n\n\n<p>With GetW9, teams typically use it to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>send vendors a secure link to complete a W-9 (no PDF ping-pong),<\/li>\n\n\n\n<li>reduce missing fields and \u201cunreadable scan\u201d issues,<\/li>\n\n\n\n<li>save completed W-9 PDFs with a submission history,<\/li>\n\n\n\n<li>control who can access tax forms (role-based access),<\/li>\n\n\n\n<li>and (optionally) connect QuickBooks to reduce duplicate vendor entry.<\/li>\n<\/ul>\n\n\n\n<p>If your current process involves email attachments and manual typing, you\u2019re manufacturing mismatches. Fix the intake process first \u2014 then validation becomes easy.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_mistakes_that_create_nameTIN_mismatches\"><\/span>Common mistakes that create name\/TIN mismatches<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>If you do nothing else, stop these:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Copying the vendor name from an invoice instead of the W-9<\/li>\n\n\n\n<li>Storing DBA in the legal name field<\/li>\n\n\n\n<li>Letting multiple people \u201cedit vendor name\u201d with no rules<\/li>\n\n\n\n<li>Waiting until January to request corrections<\/li>\n\n\n\n<li>Treating vendor master data as \u201cadmin work\u201d instead of compliance infrastructure<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_TIN_Matching_required\"><\/span>Is TIN Matching required?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Not always. But it\u2019s a strong preventative step if you file information returns and want to reduce mismatch issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Does_TIN_Matching_replace_collecting_a_W-9\"><\/span>Does TIN Matching replace collecting a W-9?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>No. TIN Matching validates the record. The W-9 is the vendor\u2019s certification and the source document you need on file.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_often_should_I_run_TIN_Matching\"><\/span>How often should I run TIN Matching?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>At minimum: <strong>before filing 1099s<\/strong>.<br>If you have high vendor turnover: consider a <strong>monthly or quarterly vendor audit<\/strong> run (especially after onboarding spikes).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"If_I_received_a_CP2100_notice_what_should_I_do_first\"><\/span>If I received a CP2100 notice, what should I do first?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Follow the CP2100\/B-Notice process. Don\u2019t improvise. Your goal is compliance, documentation, and starting\/stopping backup withholding when required.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Will_TIN_Matching_catch_vendor_fraud\"><\/span>Will TIN Matching catch vendor fraud?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Not reliably. Fraud prevention requires controls like bank-change verification, segregation of duties, and secure intake \u2014 separate topic.<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is TIN Matching required?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Not always. But it\u2019s a strong preventative step if you file information returns and want to reduce name\/TIN mismatch issues before you submit 1099s.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does TIN Matching replace collecting a W-9?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. TIN Matching validates the name\/TIN combination against IRS records. A W-9 is the vendor\u2019s certification and the source document you should keep on file.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How often should I run TIN Matching?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"At minimum, run it before filing 1099s. If you onboard vendors continuously or have high vendor turnover, consider running it as part of a monthly or quarterly vendor audit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"If I received a CP2100 notice, what should I do first?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Follow the CP2100\/CP2100A and B-Notice process and document your outreach. Your goal is to correct vendor records and comply with any required steps, including starting or stopping backup withholding when applicable.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will TIN Matching catch vendor fraud?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Not reliably. TIN Matching is for validating name\/TIN combinations. Fraud prevention requires additional controls like bank-change verification, segregation of duties, and secure vendor intake workflows.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Takeaway\"><\/span>Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>TIN Matching is not a \u201cnice-to-have\u201d for AP teams who file 1099s. It\u2019s a <strong>prevention tool<\/strong> that helps you:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>reduce name\/TIN mismatch headaches,<\/li>\n\n\n\n<li>avoid unnecessary vendor follow-ups,<\/li>\n\n\n\n<li>and keep compliance from turning into a January fire drill.<\/li>\n<\/ul>\n\n\n\n<p><strong>The winning combo is simple:<\/strong><br><strong>Collect clean W-9s \u2192 enforce naming rules \u2192 validate before filing \u2192 keep an audit trail.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/getw9.tax\/?utm_source=blog&amp;utm_medium=insideblog&amp;utm_campaign=insideblog#pricing\">Request W-9s via a secure link<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve ever received a CP2100 notice, you already know the pain: a vendor name\/TIN mismatch turns into follow-ups, documentation, and sometimes backup withholding. The frustrating part is most of these issues are preventable. That\u2019s what IRS TIN Matching is for. TIN Matching helps you validate a vendor\u2019s name + taxpayer identification number (TIN) combination [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3915,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[216,39],"tags":[235,62,159,67,240,139,77],"class_list":["post-3912","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-irs-notices-backup-withholding","category-tax-compliance","tag-accounts-payable","tag-backup-withholding","tag-cp2100","tag-tin-matching","tag-vendor-data","tag-vendor-onboarding","tag-w-9"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>IRS TIN Matching 101 (2026): When to Use It, What It Catches, What It Doesn\u2019t<\/title>\n<meta name=\"description\" content=\"Learn when to use IRS TIN Matching, what it catches (and doesn\u2019t), and how to reduce CP2100 notices and backup withholding risk.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"IRS TIN Matching 101 (2026): When to Use It, What It Catches, What It Doesn\u2019t\" \/>\n<meta property=\"og:description\" content=\"Learn when to use IRS TIN Matching, what it catches (and doesn\u2019t), and how to reduce CP2100 notices and backup withholding risk.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/getw9.tax\/blog\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"getW9 Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/getw9.tax\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-09T06:19:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-09T06:19:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/getw9.tax\/blog\/wp-content\/uploads\/2026\/02\/getw9_feature_image_tin_matching_101.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Akash\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@getw9_\" \/>\n<meta name=\"twitter:site\" content=\"@getw9_\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Akash\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\\\/\"},\"author\":{\"name\":\"Akash\",\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/#\\\/schema\\\/person\\\/aeced3801994cc34bbe402ca6cf69908\"},\"headline\":\"IRS TIN Matching 101: When to Use It, What It Catches, What It Doesn\u2019t (2026 Guide)\",\"datePublished\":\"2026-02-09T06:19:33+00:00\",\"dateModified\":\"2026-02-09T06:19:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\\\/\"},\"wordCount\":1486,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/irs-tin-matching-101-when-to-use-it-what-it-catches-what-it-doesnt-2026-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/getw9.tax\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/getw9_feature_image_tin_matching_101.jpg\",\"keywords\":[\"accounts payable\",\"Backup Withholding\",\"CP2100\",\"TIN Matching\",\"vendor data\",\"vendor onboarding\",\"W-9\"],\"articleSection\":[\"IRS Notices &amp; 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