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18px;font-size:13.5px;color:#E4EEE9;}#dt-page .tcta-more li{display:flex;gap:7px;align-items:flex-start;line-height:1.45;}#dt-page .tcta svg{width:14px;height:14px;flex-shrink:0;margin-top:3px;color:#6FE3B6;}#dt-page .tcta-act{margin-top:26px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}#dt-page .tcta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--mint-fill);color:#fff;font-family:'Lato',sans-serif;font-weight:700;font-size:16px;border-radius:8px;padding:14px 22px;text-decoration:none;}#dt-page .tcta-btn:hover{background:#0C9A6E;}#dt-page .tcta-btn svg{width:16px;height:16px;margin:0;color:#fff;}#dt-page .tcta-g2{font-size:12.5px;color:#CFE0D8;}#dt-page .tcta-g2 strong{color:#fff;}#dt-page .tcta-g2 .stars{color:#E0A32E;letter-spacing:1px;font-size:11px;}#dt-page .tcta-fine{margin:12px 0 0;font-size:12.5px;line-height:1.55;max-width:52ch;color:#8FA69A;}#dt-page .tcta-shot{align-self:stretch;display:flex;align-items:center;}#dt-page .tcta-frame{width:calc(100% + 140px);border-radius:10px 0 0 10px;overflow:hidden;box-shadow:0 30px 60px -30px rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.14);border-right:none;background:#fff;}#dt-page .tcta-frame .bar{height:26px;display:flex;align-items:center;gap:6px;padding:0 12px;background:#EEF2F0;border-bottom:1px solid var(--border);}#dt-page .tcta-frame .bar i{width:8px;height:8px;border-radius:50%;background:#C9D3CE;}#dt-page .tcta-frame img{display:block;width:100%;height:auto;}#dt-page .tcta-cap{margin-top:10px;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:#8FA69A;}@media (max-width:900px){#dt-page .tcta{grid-template-columns:1fr;padding:32px 24px 0;gap:28px;}#dt-page .tcta-shot{margin:0 -24px 0 0;}#dt-page .tcta-frame{width:100%;}}@media (max-width:600px){#dt-page .tcta h2{font-size:23px;}#dt-page .tcta-more{grid-template-columns:1fr;}#dt-page .tcta-btn{width:100%;justify-content:center;}}#dt-page .definition .def-text{font-size:16px;line-height:1.6;}<\/style><div id=\"dt-page\" class=\"dt-page\"><section class=\"pc-head\"><div class=\"wrap\"><nav class=\"breadcrumb\" aria-label=\"Breadcrumb\"><ol><li><a href=\"\/en\/\">Home<\/a><\/li><li><a href=\"https:\/\/datatrue.com\/en\/resources\/\">Resources<\/a><\/li><li><a href=\"https:\/\/datatrue.com\/en\/resources\/privacy-compliance\/\">Privacy &amp; Compliance<\/a><\/li><li aria-current=\"page\">Consent Verification<\/li><\/ol><\/nav><div class=\"head-grid hv2\"><div class=\"head-title\"><span class=\"eyebrow\"><span class=\"dot\"><\/span>Privacy &amp; Compliance <span class=\"sep\">\/<\/span> Overview<\/span><h1>Consent Verification: Prove Your Tags Actually Respect Consent<\/h1><\/div><div class=\"head-media\"><figure class=\"r1-fig r1-hero\"><img loading=\"lazy\" decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/H-CONSENT.png\" alt=\"\" width=\"640\" height=\"440\"><\/figure><div class=\"definition\" id=\"definition\"><p class=\"def-kicker\">Summary<\/p><p class=\"def-text\"><strong>Consent verification<\/strong> is testing what your tracking tags do in each consent state, to prove they match what your consent banner promises. It confirms that no tag fires before a visitor agrees, that tags stop on an opt-out or a Global Privacy Control signal, and that no tag leaks personal or health data.<\/p><\/div><\/div><div class=\"head-rest\"><div class=\"head-lead\"><p>Your consent management platform, or CMP, is the front end of consent. It shows visitors their options and stores what they pick. It has no control over a tag that was hardcoded onto a page, added outside your tag manager, or dropped in by another script. Those tags fire on their own, and the only way to find them is to watch what actually happens on the page. That is what DataTrue does.<\/p><p>The sections below walk through each check, how DataTrue tests it in a real browser, and how to catch a consent regression before it reaches your live site.<\/p><\/div><\/div><\/div><\/div><\/section><div class=\"wrap pillar-body\"><div class=\"prose\"><h2 id=\"what-consent-verification-checks\">What consent verification checks<\/h2><p>Three questions decide whether your consent setup holds. Each one has its own guide, and DataTrue tests each one directly.<\/p><figure class=\"r1-fig r1-diagram\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/D02.png\" alt=\"Example policy: necessary tags may always fire. Analytics tags stop on Reject all. Ad tags stop on Reject all and GPC.\" width=\"960\" height=\"400\" loading=\"lazy\"><\/figure><\/div><div class=\"module card-grid three\"><div class=\"r-card numbered\"><span class=\"rc-n\" aria-hidden=\"true\">1<\/span><h3>Do your tags fire before consent?<\/h3><p>The first failure to rule out. If a pixel loads before a visitor has answered the banner, you have collected data without a basis, whatever the banner shows afterward.<\/p><a href=\"https:\/\/datatrue.com\/en\/resources\/privacy-compliance\/do-tags-fire-before-consent\/\" class=\"rc-go\">How to check whether your tags fire before consent. <svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3 8h10M9 4l4 4-4 4\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg><\/a><\/div><div class=\"r-card numbered\"><span class=\"rc-n\" aria-hidden=\"true\">2<\/span><h3>Do your tags respect consent once it is given?<\/h3><p>Consent is not one switch. A visitor might accept analytics and decline advertising, and every tag has to follow that specific choice. Verification confirms each tag matches the exact consent the visitor gave.<\/p><a href=\"https:\/\/datatrue.com\/en\/resources\/privacy-compliance\/verify-tags-respect-consent\/\" class=\"rc-go\">How to verify your tags respect consent. <svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3 8h10M9 4l4 4-4 4\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg><\/a><\/div><div class=\"r-card numbered\"><span class=\"rc-n\" aria-hidden=\"true\">3<\/span><h3>Does your cookie banner actually block the tags it claims to block?<\/h3><p>A banner that displays the right choices can still sit on top of tags it never controls. Proving it works means opting out and confirming, tag by tag, that the ones that should stop have stopped.<\/p><a href=\"https:\/\/datatrue.com\/en\/resources\/privacy-compliance\/prove-your-cookie-banner-works\/\" class=\"rc-go\">How to prove your cookie banner blocks tags. <svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3 8h10M9 4l4 4-4 4\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg><\/a><\/div><\/div><div class=\"prose\"><h2 id=\"how-datatrue-verifies-consent\">How DataTrue verifies consent<\/h2><p>DataTrue runs your site the way a real visitor would, in a real browser, in each consent state, and records exactly what every tag sent and when. There&#8217;s nothing of ours to install on your pages. DataTrue doesn&#8217;t ask you to add any script, tag or code to your site.<\/p><figure class=\"r1-fig r1-shot\"><div class=\"r1-crop\" style=\"max-width:1190px\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/consent-state-test-edited-crop.png\" alt=\"A DataTrue opt-out consent test: Facebook Pageview was blocked as expected, while two DoubleClick tags and Snapchat failed their block checks.\" width=\"1190\" height=\"410\" loading=\"lazy\"><\/div><\/figure><\/div><div class=\"module feat-grid\"><div class=\"feat\"><div class=\"f-check\" aria-hidden=\"true\">&#10003;<\/div><h3>Coverage and Simulation tests.<\/h3><p>A Coverage test crawls your whole site and reports every tag it finds, including the ones outside your tag manager that a CMP never sees. A Simulation test walks a defined journey, a checkout or a registration, step by step, and checks what each tag transmitted at each step. Coverage tells you what is present across the site. Simulation tells you what happens during a real transaction.<\/p><\/div><div class=\"feat\"><div class=\"f-check\" aria-hidden=\"true\">&#10003;<\/div><h3>Consent states, tested directly.<\/h3><p>DataTrue tests your site with consent granted, with consent declined, and with individual categories accepted or refused, then compares what fired against what your policy allows. The Tag Policy and Cookie Policy rules define what is allowed, not allowed, or required in each state, so a tag firing where it should not is flagged as a failure rather than left for someone to notice.<\/p><\/div><div class=\"feat\"><div class=\"f-check\" aria-hidden=\"true\">&#10003;<\/div><h3>Global Privacy Control.<\/h3><p>DataTrue tests GPC by loading your site with a GPC-signalling browser extension switched on, then confirming the tags that should stop actually stop. This is a real signal from a real browser, the same way a visitor&#8217;s own browser would send it.<\/p><\/div><div class=\"feat\"><div class=\"f-check\" aria-hidden=\"true\">&#10003;<\/div><h3>Sensitive Data Detection with Personas.<\/h3><p>DataTrue fills your forms with fictitious personas, profiles carrying fake names, emails, and payment details, then watches every tag payload for that data. Because the data is invented, we can test for a leak to Meta, Google, or LinkedIn without ever putting a real customer&#8217;s information at risk. Sensitive Data Detection can be set to fail a test the moment protected data appears in a payload. This is DataTrue&#8217;s <a href=\"\/en\/platform\/pii-leak-detection\/\">PII leak detection<\/a> at work, so the full picture of your tracking covers both consent and data leakage.<\/p><\/div><div class=\"feat wide\"><div class=\"f-check\" aria-hidden=\"true\">&#10003;<\/div><h3>A defensible audit trail.<\/h3><p>Every test run produces a timestamped record of what fired, what it sent, and under which consent state. That Launch Report is the evidence a privacy or legal team can show a regulator, and the alert a marketing team gets when a scheduled test finds a tag doing something it should not.<\/p><\/div><\/div><div class=\"prose\"><h2 id=\"catch-it-before-it-ships\">Catch it before it ships<\/h2><p>Most consent failures are introduced by a change: a new campaign pixel, a tag manager edit, a developer update that re-enables something. DataTrue can run these same checks against a draft GTM Preview or Adobe Tags container before it goes live, so a consent regression is caught in staging, before a single real visitor is affected. The CI API can also run your test suites automatically on every release, on top of the continuous testing running against your live site.<\/p><figure class=\"r1-fig r1-shot\"><div class=\"r1-crop\" style=\"max-width:942px\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/pre-publish-test-result-crop.png\" alt=\"A DataTrue test of a draft change, validated: the home page, the reject-consent step and the pricing page after rejecting all passed.\" width=\"942\" height=\"330\" loading=\"lazy\"><\/div><\/figure><p><a href=\"\/en\/platform\/consent-cookie-compliance\/\">See how consent verification works in DataTrue<\/a><\/p><\/div><div class=\"prose\"><section class=\"faq-block\" aria-labelledby=\"questions\"><h2 id=\"questions\">Questions<\/h2><div class=\"faq-list\"><details class=\"faq-item\" open><summary>What is consent verification?<\/summary><p>Consent verification is testing what your tracking tags actually do in each consent state, to confirm they match what your consent banner promises. It checks that tags wait for consent, stop on opt-out and on a GPC signal, and do not leak personal data.<\/p><\/details><details class=\"faq-item\"><summary>Why isn&#8217;t a consent banner enough on its own?<\/summary><p>A banner records a visitor&#8217;s choices but does not enforce them. Tags added outside your tag manager, hardcoded onto a page, or loaded by another script can fire regardless of what the visitor chose. Verification is how you confirm the banner&#8217;s choices are actually applied.<\/p><\/details><details class=\"faq-item\"><summary>How does DataTrue test consent without using real customer data?<\/summary><p>DataTrue fills forms with fictitious personas, invented profiles with fake names, emails, and payment details, then checks whether any tag transmits that data. Because the data is not real, testing for a leak never exposes an actual customer&#8217;s information.<\/p><\/details><details class=\"faq-item\"><summary>Can DataTrue check consent before a change goes live?<\/summary><p>Yes. DataTrue can run the same consent checks against a draft GTM Preview or Adobe Tags container before publish, and automatically on each release through its CI API, so a consent regression is caught in staging rather than in production.<\/p><\/details><details class=\"faq-item\"><summary>How does DataTrue test Global Privacy Control?<\/summary><p>DataTrue loads your site with a GPC-signalling browser extension enabled and confirms that the tags required to stop under a GPC opt-out actually stop. The signal comes from a real browser, which is how a real visitor&#8217;s GPC setting would reach your site.<\/p><\/details><\/div><\/section><\/div><\/div><section class=\"band alt\" aria-labelledby=\"related\"><div class=\"wrap\"><div class=\"section-head\"><h2 id=\"related\">Related guides<\/h2><\/div><div class=\"tile-grid\"><a href=\"\/en\/platform\/pii-leak-detection\/\" class=\"tile\"><span class=\"t-label\">Platform<\/span><h3>PII Leak Detection<\/h3><\/a><\/div><\/div><\/section><section class=\"tcta-band\"><div class=\"wrap\"><div class=\"tcta\"> <div class=\"tcta-copy\"><span class=\"eyebrow on-dark\"><span class=\"dot\"><\/span>30-day free trial<\/span><h2>See what your tags do in every consent state<\/h2><p class=\"tcta-sub\">DataTrue loads your real pages as a visitor who accepts, rejects, or sends an opt-out signal, and reads what each tag sends. A tag that ignores the visitor&#8217;s choice shows up in a test.<\/p> <div class=\"tcta-k\">What DataTrue checks<\/div><ul class=\"tcta-list\"><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>Every page, with coverage scans<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>Scheduled runs, with alerts when a result changes<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>Full journeys, like checkout and signup, in each consent state<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>What each tag sent, field by field<\/li><\/ul> <div class=\"tcta-k\">Also in the full platform<\/div><ul class=\"tcta-more\"><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>PII detection with test personas<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>iOS and Android app testing<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>Pre-publish testing for GTM and Adobe Tags<\/li><li><svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3.5 8.5l3 3 6-7\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>REST API, plus Slack and Jira alerts<\/li><\/ul> <div class=\"tcta-act\"><a class=\"tcta-btn\" href=\"https:\/\/datatrue.com\/en\/start-free-trial\/\">Start a free 30-day trial <svg viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\"><path d=\"M3 8h10M9 4l4 4-4 4\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg><\/a><span class=\"tcta-g2\"><span class=\"stars\">\u2605\u2605\u2605\u2605\u2605<\/span> <strong>4.6\/5<\/strong> on G2<\/span><\/div> <p class=\"tcta-fine\">The full platform, every feature, free for 30 days.<\/p><\/div> <div class=\"tcta-shot\"><div style=\"width:100%\"><div class=\"tcta-frame\"><div class=\"bar\"><i><\/i><i><\/i><i><\/i><\/div><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/consent-state-test-edited.png\" alt=\"A DataTrue opt-out consent test listing the tags that should be blocked, with pass or fail for each\" width=\"1402\" height=\"876\" loading=\"lazy\"><\/div><div class=\"tcta-cap\">A consent-state test in DataTrue<\/div><\/div><\/div> <\/div><\/div><\/section><\/div><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is consent verification?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Consent verification is testing what your tracking tags actually do in each consent state, to confirm they match what your consent banner promises. 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