Yes, you can pick a lock with a credit card. However, it is not as easy as it looks in the movies. It takes practice and a lot of patience. But keep in mind that this method will not work on all locks.  If your lock is only used to open cabinets or drawers. Then it can be opened with a thin plastic like a credit card. Although we do not advise you to try to pick a lock with a credit card.  On the other hand, if you want to open the door using this method then it will take some time for you. Some locks are designed to be more difficult to pick.