Do I have to have a resignation certificate to renew my social security?

Legal analysis: it is generally unnecessary for new units to participate in insurance. If the social security of a unit in the same area is not connected to the gold insurance project, you may still need your old-age insurance connection card, otherwise you will have to use a new social security number to join the insurance, and it will be very troublesome to merge the managers in the future.

Legal basis: Article 57 of the Social Insurance Law of People's Republic of China (PRC) stipulates that the employing unit shall, within 30 days from the date of its establishment, apply to the local social insurance agency for social insurance registration with its business license, registration certificate or unit seal. The social insurance agency shall, within fifteen days from the date of receiving the application, examine and issue the social insurance registration certificate.

Where the social insurance registration items of the employing unit are changed or the employing unit is terminated according to law, it shall, within 30 days from the date of change or termination, go to the social insurance agency to handle the change or cancellation of social insurance registration.