First of all, the master card refers to the owner of the credit card account, that is, the person who makes the primary plan of the credit card and authorizes the use of the credit line. The repayment, use and limit of the credit card account are ultimately the responsibility of the owner of the main card, so when handling the credit card, the applicant needs to confirm whether it is necessary to set up the main card and the auxiliary card.
Secondly, supplementary cards are other cardholders authorized by the main cardholder to use a specific credit line. Different supplementary cards can be allocated different credit lines, which is convenient for management and use. However, it should be noted that even the secondary card must be repaid by the owner of the primary card, otherwise the credit records of the primary card and the secondary card will be affected.
Finally, the temporary use card that supports the temporary setting of the right to use can easily give temporary users a certain credit line, but relatively speaking, the cost is higher and the use cycle is shorter. So generally speaking, it is not recommended to choose a temporary card.
In a word, the main card is the owner of the credit card account and bears the ultimate responsibility and repayment obligation, while the supplementary card and temporary use card use a specific credit line under the authorization of the main card holder, so different card types should be selected according to different needs.