If you suspect your card has been lost or stolen, report it right away.
After Hours Numbers:
Lost/Stolen Debit Card: (800) 472-3272
Lost/Stolen Credit Card: (855) 343-3819
If you receive a new card to replace the one that was reported lost or stolen, be sure to contact any merchants who charge your account on a monthly or subscriptions basis (such as newspaper subscriptions, gym memberships, etc) and give them your new card information to avoid authorization problems.