The police shall be called immediately, and according to the provisions of the Law on Public Security Administration Punishment, they shall be detained for 5 to 15 days, and may also be fined up to 1 yuan. However, if the accumulated amount of fraud exceeds 2-5, the criminal responsibility of fraud can be investigated. The police can contact the bank to get the card number information.

legal basis: article 51 of the measures for the administration of bank card business: (1) the issuing bank has the right to examine the credit status of the applicant, obtain the personal data of the applicant, and decide whether to issue a card to the applicant and determine the overdraft limit of the credit card holder.

(2) The issuing bank has the right of recourse against the cardholder's overdraft. If the cardholder fails to return the overdraft within the prescribed time limit, the issuing bank has the right to apply for legal protection and investigate the legal responsibility of the cardholder or the relevant parties according to law.

(3) The card-issuing bank has the right to cancel the cardholder's qualification for failing to comply with its articles of association, and may authorize the relevant units to withdraw their bank cards.

(4) The issuing bank may not report the loss of the electronic wallet in the stored value card and C card.