Repay your Social Security Overpayment Online. Using your bank's online bill pay feature, to make a payment to "Social Security Administration." • Send us a check for the entire amount of the overpayment. Please call 1-800-772-1772 or your local field office and we may be able to process your waiver request quickly over the phone. Receiving an overpayment letter from the SSA can be frightening. Learn the steps to manage it in this blog post.