Hello Cor,
Just trying to think of a solution from a different angle. There is a standard SAP credit management functionality called "Credit Account" (Also known as Credit Master creation for group of customers).
Refer this link on more details.. One Credit Master record (FD32) for Group of Customers
Based on that, can you try below.
- Specify your payer as a branch customer (I'm just taking those examples used in the document for clarity)
- Then try assigning sold to party as the Head office (Credit Account).
I am not sure whether this will work for your requirement. But thought it's worth for a try..
Please keep us posted on your findings.
Thanks
Regards,
Simon