Notifying the recipient of the existence of an overpayment is both an initial determination
of the overpayment and notification that the overpayment must be repaid. (See SI 02201.005B.4.) The overpayment notice documents the beginning of the appeal time limits.
Many overpayment notices are systems-generated through the Automated Overpayment Notice
System (AONS) and are recorded on the system.
Overpayment cases that are excluded from AONS (see SM 01310.305) require a manually prepared notice.