Social security bureau pays the materials needed for social security.

Legal analysis: 1. Fill in the Application Form for Social Insurer's Repayment in duplicate and affix the official seal;

2. The original employee labor contract and a copy with official seal during the overdue period;

3. The original employee payroll and a copy of the official seal during the overdue period;

4. The original accounting vouchers (bound into volumes) containing the salary payment during the overdue period.

Legal basis: Article 23 of the Social Insurance Law of People's Republic of China (PRC), employees shall participate in the basic medical insurance for employees, and the employer and employees shall jointly pay the basic medical insurance premium in accordance with state regulations. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic medical insurance for employees and other flexible employees can participate in the basic medical insurance for employees, and individuals pay the basic medical insurance premium in accordance with state regulations.