promissory note - a note that promises to pay a debt
This is because Cory issued a note to his creditor as a promise that he will pay the creditor. With this, he will be gaining a Notes Payable, or a promissory note stating that he will pay, and will be losing an Accounts Payable. So according to the rules of accounting, if a liability is debited, then it will be lessened from the books of the business. If a liability is credited, however, then it will be added to the records of the business.