Understandable
3.3.4 Error Prevention (Legal, Financial, Data)
Submissions that create legal commitments, move money or change stored data must be reversible, checked for errors, or confirmed before they are final.
Who it helps
People with cognitive or motor disabilities who make input mistakes.
Failures we see most
- Payments submitted with no review step
- Account deletion with no confirmation
How it gets tested
No automated tool can judge 3.3.4 reliably, so a specialist tests it by hand, with a keyboard and a screen reader where that applies.
How we fix it
A specialist fixes this in your site's code or content, and we re-test the page before you sign off.
Official text: W3C, Understanding 3.3.4 Error Prevention (Legal, Financial, Data). Checks listed from axe-core 4.14.0.
Related criteria
Does your site fail 3.3.4?
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