When you send extra money, be sure to indicate that the excess payment is to be applied to the principal and keep records. We have many quick and easy options to make your loan payments, including online banking, mobile banking, in branch, phone and mail.A payoff letter provides instructions on how to pay off a loan with a lump sum before the loan term ends. Learn how payoff letters work. A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment. Can I send extra money to apply to my loan? PSECU loan payment is easy. Make a PSECU payment here. Use our free loan payment calculator to estimate monthly payments, interest, and repayment timelines. Loan servicing and loan modification information from Carrington Mortgage.