【案例】2011年3月5日,张某不慎丢失钱包。次日他想起钱包内还有一张信用卡,遂报警并挂失。不久,张某收到一条手机短信,提示信用卡在某商场刷卡消费4000元。张某通过奎屯垦区公安机关调出犯罪嫌疑人在商场刷卡消费时的签购单复印件,发现上面的签名与他在信用卡背面签字条上的 [Case] ​​March 5, 2011, Zhang lost his wallet inadvertently. The next day he remembered there was a credit card in his wallet, and then the police report the loss. Soon, Zhang received a mobile text message, suggesting credit card spending in a mall spending 4000 yuan. Zhang through the Kuitun reclamation area public security organs transferred out of the suspects in the mall credit card when purchasing a copy of the purchase order and found the above signature and his signature on the back of the credit card