Thousands of US citizens reside abroad and social security requires citizens living abroad to notify them of their current address. Your current address may not be the the same as the address currently listed with them as lots of retirees move around.
Failure to timely notify them could result in a suspension of benefits until compliance.
The main reason for stricter compliance abroad comes in the death reporting area. Currently, hospitals, funeral homes, nursing homes etc., in the US are required to notify social security of deaths at their facility. This allows social security to terminate those benefits shortly after notification. Such is not the case in many countries, and there are reported cases of people continuing to collect benefits years after the recipient has passed.
Note that another area of fraud involves legal permanent residents collecting ss benefits after returning to their home country. While legal permanent residents are entitled to collect ss benefits, they may not reside outside the US for a period longer than 6 moths or those benefits will be suspended.
Thus that is why there are the legal requirements to provide your current residence. Failure to do so could result in suspension or termination of those benefits
Respectfully,
Playacaribe2