Understanding Success Criterion 3.3.6: Error Prevention (All)

Success Criterion 3.3.6 Error Prevention (All) (Level AAA): For Web pages that require the user to submit information, 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.

Intent

The intent of this Success Criterion is to help users with disabilities avoid consequences that may result from making a mistake when submitting form data. This criterion builds on Success Criterion 3.3.4 in that it applies to all forms that require users to submit information.

Users with disabilities may be more likely to make mistakes and may have more difficulty detecting or recovering from mistakes. People with reading disabilities may transpose numbers and letters, and those with motor disabilities may hit keys by mistake. Providing the ability to reverse actions allows users to correct a mistake. Providing the ability to review and correct information gives the user an opportunity to detect a mistake before taking an action.

Benefits

Examples

Related Resources

Resources are for information purposes only, no endorsement implied.

Techniques

Each numbered item in this section represents a technique or combination of techniques that the WCAG Working Group deems sufficient for meeting this Success Criterion. However, it is not necessary to use these particular techniques. For information on using other techniques, see Understanding Techniques for WCAG Success Criteria, particularly the "Other Techniques" section.

Sufficient Techniques

  1. Following the sufficient techniques for Success Criterion 3.3.4 for all forms that require the user to submit information.

Key Terms