1. Confirm whether the payer has registered with social security or medical insurance institutions.

2. If the insurance registration business has been handled, it is because the payer entered the wrong certificate type, certificate number or name when paying the fee, resulting in the social security fee management subsystem at the tax end not finding the registration information of the payer, that is, the registration information does not exist and there is no natural person registration information.

3. The certificate type, certificate number or name entered by the payer is correct. Because the payer did not successfully handle the relevant registration business, there is no registration information of the payer in the management subsystem of the tax end, that is, the registration information does not exist and there is no registration information of natural persons. In view of the above mistakes, it is necessary for the payer to handle the insurance registration business in advance, and carefully check whether the input certificate type, certificate number or name is correct when handling the payment business. If the check is wrong, it can be revised and paid again. If the problem still exists after the inspection, the tax department personnel need to intervene in time to register the association.