According to Caiti.com's inquiry, the reasons why the relative card has a quota but cannot be used are as follows:

1. Exceeding the limit: exceeding the monthly limit of the relative card, and cannot be used.

2, the scene is wrong: the relative card can only be used for daily consumption, not for red envelopes, transfers and wealth management.

3. No money: the payer's bank card has no money and cannot be used.

4. Payment method error: the payment method of the relative card is mainly set by the donor. If it is set to credit card payment, if the transaction does not support credit card payment, the amount of the opposite card cannot be used.