(800) 815-7701 How to Activate a Sears Credit Card. By phone: Call 1 (800) 815-7701 or the number on the sticker attached to the front of the card. Verify your personal information (e.g. Social Security number, card number, or phone number associated with your application) to activate your Sears Credit Card.
Use something readily identifiable, such as your name, birthday, spouse or child's name, Social Security Number, phone number or street address. These can be traced directly to you and are easy for potential hackers to guess. Use letters or numbers that are near each other on the keyboard (i.e. hjkl;). Share your information with anyone — ever.