Duplicate checks on Bacs 3-day files

Submission file checks

When transmitting to the Bacs 3-day service, Experian Payments Gateway raises:

• Errors if a submission file sent today has the same processing date, Service User Number and Submission Serial Number. The file cannot be transmitted to the payment service
• Warnings if a submission file sent in the last 31 days has the same processing date, Service User Number and Submission Serial Number. The submission can still be transmitted.

Note: If the Submission Serial Number is not imported from the header, Experian Payments Gateway generates a unique Submission Serial Number when you import the file. This means that if you import the same file twice using this custom format, it will not be marked as a duplicate.

Payment file checks

When transmitting to the Bacs 3-day service, Experian Payments Gateway raises:

• Warnings if the payment file contains Direct Debit Instructions and another payment file sent in the last 31 days has a matching checksum and Service User Number. The submission can still be transmitted.
• Warnings if the payment file does not contain Direct Debit Instructions and another payment file sent in the last 31 days has a matching Service User Number, Processing Date, File Number, debit count, credit count, debit total and credit total. The submission can still be transmitted.

Note: If the file number is not imported from the header, Experian Payments Gateway sets it to 000.

For multi-file submissions, Experian Payments Gateway applies these checks to each payment file within the submission to make sure the submission does not contain duplicate payment files.

For multi-processing date files, only the processing date and file number are checked.

Applies to

• Experian Payments Gateway - Experian Payments UK Gateway