Hi Jaymin
But there is no other option in my opinion. However complex it might be, a system enhancement is needed in my opinion
You need to try matching the 3 or 4 chars in EBS file with the last 3 or 4 Chars of Billing document
Is it the Customer giving 3 or 4 chars only or the Bank truncating it? If it is the Bank, you need to speak to them and see if they can enhance the field length in the file
Or you do enhancement during SD Billing and generate the Billing docs in a way that using the last 3 or 4 chars you can identify a document easily.. For eg: Billing doc number can be 90000XXX, where XXX are the first 3 or 4 chars of the Customer Number. I know its a big deal, but can be done
Regards
Ajay M