‘Error Prevention (All)’ requires a website to check, confirm and allow reversal of pages that require users to submit information.


When a user is going through a process that results them submitting information, it’s more important than ever to try and prevent mistakes.

Although all users are susceptible to making mistakes, some disabilities and impairments can make users more likely to make errors. For example, people with reading or writing difficulties may type words incorrectly and those with motor disabilities may press keys in error.

How to Pass ‘Error Prevention (All)’

If a process results in the submission of information, at least of of the following is true:

  • submissions are reversible;
  • input is checked for errors and users are given a chance to correct mistakes; or
  • users are given a chance to review and confirm all input before submitting.

‘Error Prevention (All)’ Tips

Remember this covers both submission of data and its deletion.

To make a submission or deletion reversible, provide users with a set time in which they can undo or change the action.

Check for input errors as users enter each field.

Replay all inputs to a user (or the information about to be deleted) and ask them to confirm they are correct before saving the submission.

See Also

Free Developer Resources

Join over 3,700 subscribers on my weekly web accessibility email and get free developer resources like WCAG Checklists and special offers.

Powered by ConvertKit

Over 600 developers like you have learned more about the Web Content Accessibility Guidelines with my guidebook.

Learn more >

About Author

I'm Luke, I started Wuhcag in 2012 to help people like you get to grips with web accessibility. Check out my book, 'How to Meet the WCAG 2.0'.

Leave Comment