The original unit deliberately did not transfer social security.

When the employer terminates the labor contract with the employee, it shall issue a certificate of dissolution or termination of the labor contract, and handle the transfer procedures of the file and social insurance relationship for the employee within 15 days. If the original unit intentionally fails to transfer social security, the employee may apply for mediation, arbitration or litigation.

Legal basis: Article 77 of the Labor Law of People's Republic of China (PRC) stipulates that if there is a labor dispute between an employer and an employee, the parties may apply for mediation, arbitration or bring a lawsuit according to law, or settle it through consultation.

The principle of mediation applies to arbitration and litigation procedures.

Article 84 of the Labor Contract Law of People's Republic of China (PRC) stipulates that if an employer violates the provisions of this law and detains the employee's resident identity card and other documents, the labor administrative department shall order it to return the employee within a time limit and punish it in accordance with relevant laws and regulations.

If an employing unit, in violation of the provisions of this Law, collects property from laborers by way of guarantee or other names, the labor administrative department shall order it to be returned to the laborers within a time limit and impose a fine of not less than 500 yuan but not more than 2,000 yuan per person; If it causes damage to workers, it shall be liable for compensation.

If the employee dissolves or terminates the labor contract according to law, and the employer detains the employee's files or other articles, it shall be punished in accordance with the provisions of the preceding paragraph.