What is a written document that can be transferred as a substitute for money or as an instrument of credit?

The correct answer is a type of financial instrument recognized for facilitating transactions, often ensuring quick and easy substitution for cash. Commercial paper is an unsecured, short-term debt instrument issued by a corporation, typically used for the financing of accounts payable and inventories and meeting short-term liabilities. This instrument is often a preferred method for companies to manage their cash flow because it is generally issued at a discount to face value and matures at a specified period, providing businesses with immediate liquidity.

In the context of the question, commercial paper fits as it allows for a cash-equivalent transactional form, making it a practical substitute for money. Its transferability adds to its efficiency in financial markets, prompting many corporations to adopt it widely as a credit instrument.

While cash equivalents are financial assets that are easily converted into cash, they do not specifically represent written documents. A credit note is a document issued by a seller to a buyer, typically acknowledging that the buyer has been credited for returned goods or overpayment, rather than serving as a form of payment or credit. Similarly, a promissory note is a written promise to pay a certain amount but does not encompass the same broad utility as commercial paper in financial transactions.