Supplier site customer reference field used as account number but isn't on payment xml

Summary

Supplier site customer reference field used as account number but isn't on payment xml

Content

We have quite a few vendors that have a single Taxpayer ID but multiple account numbers.  We need to have the account number print on the check so that the payment will be applied to the correct account.  The supplier level customer reference field is part of the seeded xml output but the supplier site customer reference field is not.

I am looking for recommendations on how others have handled this requirement.

Version

R13 - 19B