Social Security has retired the Portland, Oregon, post office box that took repayment checks, and mail still sent there after December 30, 2026, will go back to the sender. The agency now directs those payments to a post office box in Philadelphia. People who are repaying an overpayment by mail have until December 30 before a check mailed the old way comes back to them.
Which address replaces the Portland box?
An internal Social Security message, EM-26035, says the agency’s programmatic remittance lockbox, P.O. Box 5480 in Portland, was retired effective September 30, 2026. The replacement address is MATPSC, P.O. Box 3430, Philadelphia, PA 19122. MATPSC is the SSA unit in Philadelphia that receives the payments.
A programmatic remittance is a payment sent to Social Security, as opposed to one the agency sends out. The message lists the retirement, survivors and disability, special veterans benefits, Supplemental Security Income and Medicare program areas, and says some overpayment notices direct repayment to the Portland box…