Legal analysis:

Credit cards have been used by others, and now they are not returned, which is usually an economic dispute. Public security organs can't get involved in economic disputes. For economic disputes, the public security organs shall not file a case. But you can bring the materials borrowed by the other party to the people's court for prosecution in economic disputes.

Legal basis:

Article 112 of the Criminal Procedure Law of People's Republic of China (PRC), the people's court, the people's procuratorate or the public security organ shall, within their jurisdiction, promptly review the materials of accusation, complaint, report and surrender, and if they think that there are criminal facts that need to be investigated for criminal responsibility, they shall file a case; If it is considered that there are no criminal facts, or the criminal facts are obviously minor, and it is not necessary to pursue criminal responsibility, the case shall not be filed, and the complainant shall be informed of the reasons for not filing the case. If the complainant refuses to accept it, he may apply for reconsideration.