Detailed description:

1. China Merchants Credit Card stipulates that cardholders need to pay the minimum repayment amount on time every month. If the minimum repayment amount is not paid for three consecutive months, it will trigger overdue behavior.

2. According to the description of the problem, the minimum repayment amount was not changed within three months, and it was returned to 500 yuan in the fourth month. Although this amount may be less than the minimum repayment amount, there is repayment behavior, indicating willingness to repay.

3. Under normal circumstances, banks tend to solve problems through collection and other means in debt collection, instead of suing cardholders immediately. Therefore, it is unlikely that you will be prosecuted for not paying the minimum repayment amount for only three months and paying part in the fourth month.

4. If other key information is not mentioned in the question, you can supplement the specific repayment policy and debt collection process of China Merchants Credit Card to help further understand.

Summary:

According to the situation described in the question, if the minimum repayment amount is not paid for three consecutive months, but 500 yuan is paid in the fourth month, he will not be prosecuted. Banks usually solve the problem of arrears through collection.

Extended data: