actually, the bank can't directly find out that your credit card is reversed, but it can be judged by the way you reverse your card.
There are two ways to reverse the credit card. One way is to withdraw the money from the credit card through an ATM. This way of paying interest is a normal transaction and will not be subject to bank risk control. One is to make a virtual transaction through POS machines or online payment, and take out the money from the credit card. This method does not require interest payment, which is illegal to cash out.
The bank's risk control system can monitor the cardholder's card swiping behavior through the big data system, such as time, place, amount, number of transactions, etc. If the card swiping merchant does not match the information on the bill, or the consumption time does not match the card swiping merchant, frequent large transactions, etc., abnormal transactions like this will make the bank suspect that you are cashing out.
once the bank finds out that you are cashing in with a credit card, the consequences will be more serious, ranging from reducing the amount of the card to sealing the card, or it may be considered as malicious overdraft of the credit card. If it constitutes the crime of credit card fraud, you need to bear legal responsibility and jail time.
in a word, credit card reversal is extremely risky. Although it can solve the temporary need, it is not a long-term solution after all. Rob Peter to pay Paul will only make the loophole bigger and bigger, and in the end, it will be repaid in cash, but the card will cost a lot more interest. In addition, it is easy to be found by banks if you cash in your credit card,
so don't use your credit card to reverse your card easily unless you have to.