• If your checks or debit card are lost or stolen, please report it immediately to Cornerstone Bank at 888-297-2100.
  • To report a lost or stolen debit card after hours, please call 800-472-3272.
  • To activate or change your PIN, please call 800-992-3808.
  • If you have MasterCard questions while traveling, please call 877-253-8964.
  • If you have questions about your MasterCard benefits, please call 800-MASTERCARD (800-627-8372).