Why did the Social Security Bureau send a notice of uninsured old-age insurance?

Social endowment insurance payment reminder.

It shows that according to the agreement between the insured and the social endowment insurance institution, the payment time of social endowment insurance has passed, but it has not been paid according to the regulations, and there is a phenomenon of arrears.

Social Security Bureau, full name of Social Insurance Fund Administration, is called Social Insurance Fund Management Center in some urban areas. It mainly deals with five insurances and one gold (namely, endowment insurance, medical insurance, maternity insurance, industrial injury insurance, unemployment insurance, housing accumulation fund) and other businesses. It is a social insurance institution.