The federal government makes available low-interest-rate guaranteed student loans for eligible U.S. citizens and permanent residents. You do not need to wait until you are admitted to begin the guaranteed student loan process. To apply, complete and submit the Free Application for Federal Student Aid (FAFSA). Be sure to list the American University (AU) FAFSA code, 001434, in the college release section. The phone number to the Financial Aid office at American University is 202-885-6100, if you have questions regarding the loan process. Graduate certificate applicants do not need to complete the FAFSA, as they are not eligible for financial aid.