The Social Security Administration mandates that everyone report address changes immediately, and those receiving SSI must report the change within 10 days after the month the change occurs. Those that do not report the change in time may not receive their full benefit amount, according to the SSA.
The Social Security Administration can also penalize someone for not reporting the address change in time and withdraw the penalty from monthly statements. Those receiving state supplements in a state in which the Administration does not administer the supplement must also notify the appropriate state agency of the move, notes Nolo. Some state agencies also have penalties for failing to report an address change.