6.6. Provide explicit error messages and suggestions for correcting errors
Whenever there is a possibility that a form returns errors, the following items must be provided:
- Explicit error messages.
- Suggestions for correcting errors.
Error messages must be explicit. That is to say, just by reading the error message:
- The field concerned must be identifiable.
- The cause of the error must be understandable.
- Suggestions must be provided when an error is due to an incorrect input format.
Error messages must not disappear automatically. Messages must only disappear on a user action (closing button, display of a new page, new form submission, etc.).