A.28 WCAG 2.1 Success Criterion 3.3.6 − Error Prevention (All)

Error prevention provides safeguards against errors that are made by users. Providing users with functions to review and correct information allow users to detect mistakes before making submissions.

Before Rectification

In this screen indicating the last step of a transaction, users are forced to submit their details without a "confirmation" step.

After Rectification

It is better to allow users to first confirm the detailed information, and provide them with an option to change any of the details before making the final submission.

WCAG 2.1 Reference:

https://www.w3.org/WAI/WCAG21/Understanding/error-prevention-all