Austin Community College District - Master promissory note binding legal document that you must sign when you get a federal student loan. The master promissory note can be used to make one or more loans for one or more academic years (up to 10 years). It lists the terms and conditions under which you agree to repay the loan and explains your rights and responsibilities as a borrower. It’s important to read and save your MPN because you’ll need to refer to it later when you begin repaying your loan or at other times when you need information about provisions of the loan, such as deferments or forbearances. en