Legal analysis: It is a criminal case, and theft can constitute both a criminal case and an administrative security case. After a theft appears, if it reaches the standard of filing a case for theft, it is a criminal case. If it fails to meet the criteria for filing a criminal case, it is an administrative security case. If 4, yuan is involved, it constitutes a criminal case. Public security cases refer to violations of public security management laws and regulations, which should be punished by public security administration according to law and investigated by public security organs according to law. Public security cases correspond to criminal cases. The two cannot be mixed together.

Legal basis: Article 196 of the Criminal Law of the People's Republic of China commits credit card fraud under any of the following circumstances, and if the amount is relatively large, it shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also be fined not less than 2, yuan but not more than 2, yuan; If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than five years but not more than ten years, and shall also be fined not less than 5, yuan but not more than 5, yuan; If the amount is especially huge or there are other particularly serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 1 years or life imprisonment, and shall also be fined not less than 5, yuan but not more than 5, yuan, or his property shall be confiscated: (1) using a forged credit card or using a credit card fraudulently obtained with false identification; (2) using an invalid credit card; (3) Fraudulent use of another person's credit card; (4) Malicious overdraft. The term "malicious overdraft" as mentioned in the preceding paragraph refers to the act that the cardholder overdraws beyond the prescribed limit or time limit for the purpose of illegal possession, and still refuses to return it after being urged by the issuing bank. Whoever steals a credit card and uses it shall be convicted and punished in accordance with the provisions of Article 264 of this Law.