3.3 Input Assistance · Understandable
WCAG 3.3.4 Error Prevention (Legal, Financial, Data)
Level AA
For pages that cause legal or financial commitments or modify user data, submissions must be reversible, checked for errors, or confirmed.
Common failures
- A one-click "buy now" with no review step.
- Account deletion has no confirm step.
How to fix
- Add a review/confirm step before commits.
- Allow undo within a reasonable window.
Related criteria
- WCAG 3.3.6 Error Prevention (All) Level AAA