generally, the security code of social security card has 7 digits in italics at the top of the end of the cardholder's signature on the back of the bank card, in which the first four digits are the last four digits of the card number, and the last three digits or four digits are the security code. The process of handling the social security card is as follows:

1. Submit the relevant materials to the social security center where the household registration is located, including:

(1) Individuals applying for the social security card must provide their valid identity documents (including ID card, household registration book, passport, Hong Kong and Macao pass, military officer's card, etc.) and a copy of their valid identity documents; If the employer applies for a unified bid, it must bring a copy of the labor security certificate or a letter of introduction from the unit, provide a copy of the applicant's personal identity certificate and fill in the unit application;

(2) If the applicant is a foreign employee, relevant work certificates must also be provided;

(3) provide recent 1-inch bareheaded electronic photos of individuals or collect portraits at designated places;

(4) The applicant fills in, reads and checks the application form of the company, and signs it for confirmation;

(5) the applicant is required to pay the business card printing fee.

2. Review the staff information, and issue payment documents after the approval;

3. Pay the insurance premium monthly according to the bank information on the payment document.

Legal basis: Article 7 of the Social Insurance Law of the People's Republic of China

The administrative department of social insurance in the State Council is responsible for the management of social insurance throughout the country, and other relevant departments in the State Council are responsible for the relevant social insurance work within their respective functions and duties.

the social insurance administrative department of the local people's government at or above the county level is responsible for the social insurance management in its own administrative area, and other relevant departments of the local people's government at or above the county level are responsible for the relevant social insurance work within their respective functions and duties.