The main card is the card that the credit card account holder applies for, that is, he uses his own card.

Supplementary cards are applied by the principal cardholder for use by their relatives, such as parents and children. The bills they use are repaid by the principal cardholder, and the consumption by the principal cardholder is also visible. When applying, you need to provide the identity document of the applicant for the supplementary card. If the applicant does not have an ID card, he or she can use the user's ID book when applying for the supplementary card. Principal cards and supplementary cards belong to the category of credit cards among bank cards.

At the same time, the card type of the supplementary card must be the same as that of the main card, and it must share the credit limit with the main card. It does not have an independent account, cannot log in to online banking alone, does not issue independent bills, and repayments are included in the main card. account.

Extended information:

It is relatively easy to apply for an supplementary credit card, mainly because the supplementary card is a sub-card under the main card, and the supplementary card enjoys the limit of the main card , banks do not place excessive requirements on the qualifications and repayment abilities of supplementary cardholders.

Each main credit card can apply for up to two supplementary cards (the bank can stipulate it independently), and the main cardholder has the right to request the cancellation of its supplementary cards. The credit limit of the supplementary card is designated by the principal cardholder on the premise that it does not exceed the credit limit of the corresponding principal card; if the principal cardholder does not specify it, the credit limit of the supplementary card is the same as that of the principal card.

All transaction amounts and corresponding interest and fees of the supplementary card will be charged to the main card account, and the main cardholder shall bear all repayment responsibilities. However, the principal cardholder and the supplementary cardholder are jointly and severally liable to each other for repaying the amounts owed.

Supplementary cards can bring a lot of convenience to daily card swiping applications. Applying for a supplementary card at the same time as the main card makes it easier for supplementary card users to use the card, and the limit can also be controlled independently by the main card. It is a good choice for home financial products.

Baidu Encyclopedia_Supplementary Card