Citizens Bank services its student loans using Firstmark Services. Through the Firstmark Services tools, you can make payments to your loan, set up automatic payments, access loan details and account information, find receipts for payments made, and locate detailed instructions for making payments. You can also request payments be automatically drawn from your checking or savings account; make payments by phone at 888-538-7378; or mail payments to this address: Citizens Bank Firstmark Services PO Box 2977 Omaha, Nebraska 68103-2977