If a vendor is also a customer, which settings are necessary to clear both roles...

The payment program must be set up to allow debit checks for vendors and credit checks for customers.

The Clearing with Vendor field must be selected in the customer account, and the corresponding field must be selected in the vendor account.

The vendor and the customer must be assigned to the same group account.

The vendor number must be entered in the customer account, or the customer number must be entered in the vendor account.