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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, at least one of the following is true:
- Reversible: Submissions are reversible.
- Checked: Data entered by the user is checked for input errors and the user is provided an opportunity to correct them.
- Confirmed: A mechanism is available for reviewing, confirming, and correcting information before finalizing the submission.
Understanding Success Criterion 3.3.4: Error Prevention (Legal, Financial, Data)
Checklist – Components
Alerts and Messaging
| Test | Priority | Automated test? |
|---|---|---|
| If modifying or deleting data, is the transaction reversible or does it have a review screen? | High | None |
| Do I get stopped if navigating off the page without saving? | High | None |
| Is all data being submitted properly validated? | High | None |
| If deleting critical data, is the user required to confirm with checkbox as well as button? | High | None |