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.

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