Generally speaking, the maximum extension is three months. However, you can entrust family members or relatives to temporarily help you repay the debt while you are in prison, and you will also need to pay overdue liquidated damages. If you are under criminal detention and do not pay back your credit card debt, you will be sued by the bank for repayment. The methods for handling overdue cases are as follows:

1. If a bank files a civil lawsuit in court, the court should decide whether to accept it within 7 days from the date of receiving the litigation materials.

2. If the amount you owe reaches 10,000 yuan and you still fail to repay it more than 3 months after two collections by the bank, it will constitute a crime of credit card fraud and you should bear criminal liability. After the public security organ files a case for investigation, it usually takes about four months before the procuratorate files a public prosecution in the court.

3. "Interpretation of the Supreme People's Court and the Supreme People's Procuratorate on Several Issues Concerning the Specific Application of Laws in Handling Criminal Cases of Impeding the Management of Credit Cards"

Extended information: The parties involved were criminally detained and the credit card owed money If you fail to repay, the bank will sue the court and demand repayment: If the bank files a civil lawsuit in the court, the court should decide whether to accept it within 7 days from the date of receiving the litigation materials. If the amount you owe reaches 10,000 yuan and you still fail to repay it after two collections by the bank for more than 3 months, the credit card party will be criminally detained. If you do not repay the credit card debt, the bank will sue the court and demand repayment. : If a bank files a civil lawsuit in court, the court should decide whether to accept it within 7 days from the date of receiving the litigation materials. If the amount of your debt reaches 10,000 yuan and you still do not pay it back more than 3 months after two collections by the bank, it constitutes credit card fraud.