less rigid than a loan contract. For one thing, loan agreements often require repayment in installments, while promissory notes typically do not. Furthermore, a loan agreement usually includes the terms for recourse in the case of default, such as establishing the right to foreclose, while a promissory note does not. Difference from IOU Promissory notes differ from IOUs in that they contain a specific promise to pay along with the steps and timeline for repayment as well as consequences if repayment fails. IOUs only acknowledge that a debt exists. Negotiability Negotiable instruments are unconditional and impose few to no duties on the issuer or payee other than payment. In the United States, whether a promissory note is a negotiable instrument can have significant legal impacts, as only negotiable instruments are subject to Article 3 of the Uniform Commercial Code and the application of the holder in due course rule. The negotiability of mortgage notes has been debated, particularly due to the obligations and "baggage" associated with mortgages; however, in mortgages notes are often determined to be negotiable instruments. In the United States, the Non-Negotiable Long Form Promissory Note is not required. Use as financial instruments Promissory notes are a common financial instrument in many jurisdictions, employed principally for short time financing of companies. Often, the seller or provider of a service is not paid upfront by the buyer (usually, another company), but within a period of time, the length of which has been agreed upon by both the seller and the buyer. The reasons for this may vary; historically, many companies used to balance their books and execute payments and debts at the end of each week or tax month; any product bought before that time would be paid only then. Depending on the jurisdiction, this deferred payment period can be regulated by law; in countries like France, Italy or Spain, it usually ranges between 30 and 90 days after the purchase. When a company engages in many of such transactions, for instance by having provided services to many customers all of whom then deferred their payment, it is possible that the company may be owed enough money that its own liquidity position (i.e., the amount of cash it holds) is hampered, and finds itself unable to honour their own debts, despite the fact that by the books, the company remains solvent. In those cases, the company has the option