Marcelo Paiva

All criteriaPresent as slides

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Success criterion 3.3.4

Error Prevention (Legal, Financial, Data)

For web pages that cause legal commitments or financial transactions for the user to occur, that modify or delete user-controllable data in data storage systems, or that submit user test responses, actions are reversible, checked for input errors, and confirmed before final submission.

  • Level AA
  • Principle 3: Understandable
  • Guideline 3.3: Input Assistance

In a user’s words

“Before we seal the deal, let's double-check. No regrets, right?”

Who this helps: All users, especially those with Cognitive Impairments

What each role can do

Product manager
Incorporate review, confirmation, and correction steps before finalizing sensitive transactions.
Designer
Design clear review pages that summarize user actions and decisions before final confirmation.
Developer
Implement mechanisms for reviewing, confirming, and correcting information prior to submission.
Tester
Test the process to ensure users can easily review, correct, and confirm actions without confusion.

Once it is fixed

“Knowing I can review and confirm my actions gives me peace of mind. No surprises!”

The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 3.3.4 in the W3C quick reference for WCAG 2.2 (opens in a new tab).

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