Can social security find out which unit paid it?

Legal analysis: Yes. As long as you are insured, you will have the social security number (that is, the social security card number). See if the social security department of your city is online. If so, you can check it online. If there is no internet, you can go directly to the counter of the social security center, quote your company name or company social security number, you can find your company social security database, and then search your name. General social security center does not accept individuals, you can go to the personnel department of the unit to check.

Legal basis: Article 7 of People's Republic of China (PRC) Social Insurance Law. The administrative department of social insurance in the State Council is responsible for the national social insurance management, and other relevant departments in the State Council are responsible for the relevant social insurance work within their respective functions and duties. The social insurance administrative department of the local people's government at or above the county level shall be responsible for the social insurance management within its administrative area, and other relevant departments of the local people's government at or above the county level shall be responsible for the relevant social insurance work within their respective functions and duties.