Error 8888: The receipt number is repeated
If you receive the message when filing an information return "Error 8888: The receipt number is repeated. Only one declaration with the same supporting document is allowed. Check this information.

This error message occurs when submitting a declaration with a receipt that has already been used. The system detects more than one declaration with the same receipt number.
To avoid this error, you should review the previously submitted declarations. Correct the receipt number and submit the declaration with a correct (unused) receipt.