- Success Criterion 3.3.3
- Conformance level AA
Taken Username With No Suggested Alternatives Offered
3.3.3 — Error Suggestion
Scenario
Setting
A ride-hailing app's trip booking screen
What’s wrong
Username taken but no availability alternatives or guidance offered where feasible.
Example
On a ride-hailing app's trip booking screen: username taken but no availability alternatives or guidance offered where feasible.
Why it matters
People with cognitive disabilities and anyone stalled by vague validation messages. On a ride-hailing app's trip booking screen specifically, they lose their progress and have to start over.
How to test
Enter a taken username: if there's no suggestion of available alternatives or guidance where that's feasible, it fails.
How to fix
The error message must tell the user how to fix the problem — the expected format, range, or valid options.
Outcome
Fixed, a visitor to a ride-hailing app's trip booking screen can finish the task in one attempt.
Who is affected
People with cognitive disabilities and anyone stalled by vague validation messages.
Learn more
- Understanding Understanding document (opens in a new tab)
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- Rejected Input With No Guidance on How to Fix It
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- Rejected Entry With No Suggested Near-Match From a Known List