How to define a sequentiql numbering for a EFT Payment File

Hello,

To perform Supplier payment, we are using Payment File ( EFT and WIRE) that we upload in the bank forms.

To create the EFT FILE, we use un XML Format template that we link to a PPP that is also attached to a PPR.

So , for each payment batch we will have at the end one Payment File that we send to the bank.

However, the bank require that the file have a sequential number that will be incremented for each file , until : 9999 ( 4 DEGITS).

Is there a way on how we can perform that without need any customisation?

When i try to do that using standard document, oracle put a payment number for each payment on my batch. which is not meet my need. my need is to have a number for each Payment File.