The supplementary card is relative to the main credit card. All transaction amounts and corresponding interest and fees on the supplementary card are included in the main card account, and the main cardholder bears all repayment responsibilities. However, the principal cardholder and the supplementary cardholder are jointly and severally liable to each other for repaying the amounts owed.

First, the supplementary card is relative to the main card. Each principal cardholder who opens a credit card can apply for an additional card for other natural persons with full capacity for civil conduct, or natural persons with limited capacity for civil conduct who are over 13 years old (applicants for supplementary cards who are under 18 years old must obtain the consent of its legal representative). To apply for an additional credit card from any bank, your parents, siblings, spouse or children must have the bank's main credit card, and the applicant must be over 16 years old. In addition, you need to provide the bank with a copy of your valid ID card.

Second, what is the limit of the supplementary card?

The limit of the supplementary card depends on the limit of the main card. To put it simply, it is the limit of the main and supplementary cards. 1. Suppose your main credit card limit of China Merchants Bank is 20,000 yuan. Without any restrictions, the supplementary card of this main card can also enjoy the consumption limit of 20,000 yuan. But there is a authority here, that is, the main cardholder has the right to limit the available limit of the supplementary card to prevent the supplementary cardholder from abusing the limit, causing repayment difficulties or even overdue payments. Therefore, in fact, the limit of the supplementary card in the true sense depends on the authority granted to you by the principal cardholder

Third, because one principal card can handle multiple supplementary cards, in order to reasonably allocate the credit limit, and To ensure rational consumption behavior, I would like to remind primary cardholders that it is best to set certain limits on the amount of supplementary cards. Supplementary card application method: The main card and supplementary card can be applied simultaneously. Just check the supplementary card column when applying. If the main card has been issued, the main cardholder shall submit an application for an additional card to the bank: the main cardholder of the credit card downloads the application form from the official website of the card issuer or goes to the branch to collect the application form, fill in the main card number and supplementary card field information, and the main cardholder and the additional card holder shall sign in the signature columns of the main card and the additional card respectively. A copy of the supplementary cardholder's ID card must also be attached, and then the application form and related materials must be submitted to the card-issuing bank branch.