Six months. Anti-fraud centers generally freeze bank cards for six months, that is, the public security department freezes bank cards. For example, if the source of funds in your bank card is illegal, or if your bank card is cheated, the public security department will apply for freezing the bank card for the case, and most of them will be automatically unfrozen after June. If the fraud case has not been solved, and the funds in your bank card are really related to the case, the public security department can apply for delaying the freezing time.