After leaving the company, the company paid an extra month's social security.

Legal analysis: the company continues to pay 1 month social insurance for its employees, and the employees are not at fault. The company can solve it through other channels. If, after consultation, the employee is willing to return the part that should be paid by the individual, the company can recover it; If employees don't want to, the company can't force them to recover.

Legal basis: Article 4 of People's Republic of China (PRC) Social Insurance Law. Employers and individuals in People's Republic of China (PRC) pay social insurance premiums according to law, and have the right to inquire about payment records and personal rights records, and require social insurance agencies to provide social insurance consultation and other related services. Individuals enjoy social insurance benefits according to law and have the right to supervise the payment of their own units.