1. The payer has not registered with the social security or medical insurance institution.
2. The payer entered the wrong certificate type, certificate number or certificate name, which led to the failure to find the payer's registration information in the social security fee management subsystem at the tax end.
3. The certificate type, certificate number or name entered by the payer is correct, but because the payer has not successfully handled the relevant registration business, there is no registration information of the payer in the tax terminal management subsystem.