Can a staffing agency act as an agent for social security payments?

Personnel agencies are known to have a business of acting as an agent for the company's social security and provident fund contributions.

If Company A only realizes the payment of social security through the personnel agency, I personally think that the employee's contract should be signed with the company. Because the actual employment occurs in Company A, not the staffing agency.

But the staffing agency for social security, may be based on the requirements of the Social Security Administration to participate in the information, to provide a labor contract signed by you and the staffing agency (this labor contract or we can call the "virtual labor contract", only for social security.

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