Can I use an A/R balance for a customer who is also a vendor to offset balance owed to that vendor in A/P? If so how should I post this. Customer owes us $5000 on a posted A/R invoice, and we owe the Customer/Vendor $7500 on a posted A/P invoice, We will issue a payment of the $2500 difference but need to clear the $5000 invoice balances in A/R and A/P.