Third party supplier relationship for prepayment

Dear all,

We have defined third party payment relationship on 2 of our suppliers. We can see it's working for the ordinary payment, we can select another payee.

However, we have a use case on the prepayment invoice (vendor A) to offset with an invoice (vendor B). We cannot find a way to apply 2 transactions.

I would like to check is this a supported function to apply a prepayment (from vendor A) with and invoice (from vendor B)?

Regards,
Ray