One time on vacation my wife&#x27;s purse was stolen.  We had to call the bank(s) and get them to kill all of the credit cards.  Then we recovered the purse.  For the rest of the vacation she didn&#x27;t have access to a credit card (unless I was with her) and had to use cash for everything.  It would have been much less of an inconvenience if we would have had the ability to easily lock and unlock the CC.