Because the primary card and the secondary card enjoy the same credit limit, the cardholders of the two cards may not know how much the other party spent during use, so they should communicate frequently to avoid exceeding the credit limit.
in addition to bringing convenience to cardholders, reasonable use of supplementary cards can also save a lot of transfer fees. It is reported that cardholders can use supplementary cards in different places without handling fees. For example, parents can use the main card by themselves and let their children who go to school in different places use the supplementary card, which can avoid the handling fee required for remittance in different places and keep abreast of their children's consumption.
as far as integral is concerned, the supplementary card can be integrated with the main card, so that the integral can be accumulated quickly. For example, if you spend 5,-1, yuan in the same year, if you spread it on several different credit cards, the points of each card may be reduced, and cardholders will not be able to redeem the gifts they want; However, if all the points are accumulated on a credit card, even if the validity period of the points on the card is short, the cardholder can exchange them for more valuable gifts.