What's the impact of not having a social insurance registration certificate?

The enterprise has no social insurance registration number.

The social insurance registration certificate number is the certificate number issued by the Social Security Bureau when handling social security.

Social insurance registration refers to the behavior that the units that should pay social insurance premiums according to the provisions of Articles 2, 3 and 29 of the Interim Regulations on the Collection and Payment of Social Insurance Fees register and obtain social insurance registration certificates according to the procedures stipulated in the Interim Measures for the Administration of Social Insurance Registration.

Social insurance registration is the premise and foundation of social insurance premium collection, and it is also the foundation of the whole social insurance system. The social insurance agency of the administrative department of labor security at or above the county level shall be responsible for the registration of social insurance.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.