Thanks Mohammed Kalim.
I need to improve the hit rate of lockbox matching. I guess I need to do this through a user exit in FLB1? What is the standard way SAP lockbox matching works? I thought the incoming payment would have the invoice number that it is trying to clear in the payment details and SAP would find the invoice number that corresponds to this number in the reference field of the payment document.
Is there a table where we can specify the fields that we need to match on? like we can do for auto clearing or is this entire logic in the lockbox program?