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Understandable · Input Assistance

WCAG 3.3.6 Error Prevention (All)

AAA only: the review, correction and confirmation requirements of 3.3.4 apply to every form submission, not only legal, financial or data-deletion ones.

3.3.6 Level AAA Added in WCAG 2.0 Needs manual review

Anton StewartAuthor
Reviewed against the W3C Understanding document
Illustration: a form icon, with WCAG 3.3.6 and Error Prevention
Table of contents

What WCAG 3.3.6 Requires

AAA only: the review, correction and confirmation requirements of 3.3.4 apply to every form submission, not only legal, financial or data-deletion ones.

How to Test It by Hand

Check that every form on the site, not just high-stakes ones, offers a way to review and correct input before submitting.

Common Failures

  • A simple contact form submits immediately with no review step, which is fine at AA but fails the broader AAA requirement.

Testing WCAG 3.3.6 With AccessBell

This criterion depends on meaning or context, so it needs a person to judge. AccessBell's report lists it for manual review rather than marking it pass or fail automatically, so it is not missed.

Run a free scan to spot issues on your own pages.

Frequently Asked Questions

What does WCAG 3.3.6 require?

AAA only: the review, correction and confirmation requirements of 3.3.4 apply to every form submission, not only legal, financial or data-deletion ones.

Can AccessBell test WCAG 3.3.6 automatically?

Not fully. This criterion needs a person to judge, so AccessBell's report lists it for manual review rather than marking it pass or fail on its own.

What level is WCAG 3.3.6?

Level AAA, added in WCAG 2.0. Level AAA is the highest, most demanding conformance level in WCAG.

Sources

This page explains a technical standard and is not legal advice. See our disclaimer.

About the Author

Anton StewartAuthor

Contributor, AccessBell

Anton Stewart writes and reviews accessibility guides for the AccessBell blog, checked against the W3C standards and other primary sources.

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