If the EFT format is ALLEFT or BBMEFT, the filename is incremented each time the post process is run, so the file is never overwritten.
If the EFT format is ABAFILE, CNAB, CPA, NACHA or SEPA, the filename format is EFT + day + month + year + hour + minutes + seconds + the file extension (.aba, .dat or .xml), so the file is never overwritten.
The format of the EFT output file depends on the value of the Accounts Payable Parameters EFT Format field. See the following topics for information about the file formats:
Zengin (JBA) EFT file