Only Federal DIRECT Loans (Stafford, GradPLUS and consolidation loans) are eligible for PSLF. If you borrowed federal loans under the Federal Family Education Loan (FFEL) program, you have the option to consolidate your FFEL loans with Federal DIRECT Consolidation Loans. Keep in mind that the consolidation loan will enter repayment immediately after graduation without a grace period. You may want to consider delaying the processing of your Direct Consolidation Loan until closer to the end of your grace period.
Use your PIN to look up your federal student loans in the National Student Loan Data System.: www.nslds.ed.gov.