Juan's Goods Inc. countered that as the holder of the check in due course, they were entitled to enforce payment, notwithstanding any alterations made to the instrument. They cited Section 52 of the Negotiable Instruments Law, which provides that a holder in due course takes the instrument free from any defect of title of prior parties and can enforce payment.

: The text includes the full Negotiable Instruments Law, the Warehouse Receipts Law, and Civil Code provisions on documents of title. Authoritative Commentary

Oscar needs to pay his delivery driver, David. Instead of cash, Oscar signs the back of Elena's note and hands it to David.