Using, buying or selling forged or stolen credit cards is known as credit card fraud. If you participate in this kind of fraud, you could face serious consequences.
Any time you use a credit card without authorization, you can be accused of fraud. Sometimes, those accusations are unfounded. For example, if you go to the grocery store and take your spouse's card to pay for food, the cashier might notice the different name and signature and call someone to claim you're acting fraudulently. Usually, a simple call to verify that you had permission to use the card is enough to clear up the situation. If, for some reason, the person who authorized the card's use says that he or she did not, then you could find yourself getting arrested.