How to handle the social security card of employees in the unit?

Legal analysis: if the unit pays social security for its employees, the employer shall collect it from the tender acceptance agency with the unit's letter of introduction and the notice of obtaining the certificate.

Legal basis: Article 12 of the Social Insurance Law of People's Republic of China (PRC), the employing unit shall pay the basic old-age insurance premium in proportion to the total wages of its employees as stipulated by the state and record it in the basic old-age insurance pooling fund. Employees shall pay the basic old-age insurance premium in accordance with the proportion of wages stipulated by the state and record it in their personal accounts. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual accounts respectively.