Hi Priyanka,
Just check whether there is any relationship maintained b/w the B2B customer and the domestic customer.
(a) Collective Scenario-Parent-child relationship b/w the two BP's. So if the payment comes in at the parent level (B2B customer), it flows down to the child level (domestic customer)
(b) Alternate Payer-This is a functionality, where in the Business partner who pays the open items instead of the actual Contract partner.
May be the B2B customer is maintained as the Alternate payer along with the bank details with an alternative account holder in the contract partner master record.
Hope this helps...
Thanks,
Amlan
