In the United States, a promissory note that meets certain conditions is a negotiable instrument regulated by article 3 of the Uniform Commercial Code. Negotiable promissory notes called mortgage notes are used extensively in combination with mortgages in the financing of real estate transactions. One prominent example is the Fannie Mae model standard form contract Multistate Fixed-Rate Note 3200, which is publicly available. Promissory notes, or commercial papers, are also issued to provide capital to businesses. However, Promissory Notes act as a source of Finance to the company's creditors.