After approving an invoice for payment:

A$.$ the person who ordered the goods should examine the payment package to make sure all the documents agree.

B$.$ checks should be returned to and then mailed by the department who prepared them.

C$.$ payment is made and the payment packet should then be stamped "paid" by the person in the treasurer's department who has authorized the disbursement.

D$.$ the receiving department should examine the payment packet to make sure all the documents agree.