The most common reason for this would be that your FAFSA was selected for verification by the Department of Education, and during that process the school found an error that needed to be corrected. Once that correction was made, you were no longer eligible for grant aid. Eligibility for the Pell grant (and often for state and institutional grants) is based on the EFC--a number that is calculated from the information that you provided on your FAFSA. Schools typically prepare an award letter for freshmen based solely on the information that the student originally entered on the FAFSA. However, if the FAFSA is selected for verification, then the school is required to verify that the information the student entered is correct. If it wasn't then the school has to correct it, and that can change the EFC and the student's eligibility for aid. For example, say you submitted a FAFSA and you reported that your family's income is just $10,000. That would generally mean that you'd be eligible for a Pell grant of over $6,000 and, in many cases, grant aid from other sources as well. But, when the school verified the income by looking at your parents' tax return, it showed that they actually had $100,000 in income, not $10,000. That would change the EFC, and therefore your eligibility for grants. Unfortunately, if you were awarded aid based on inaccurate information, the school is required to revise your award and adjust them to reflect the correct information.