1. During normal business hours: please contact us using the secure email portal or call us at 303.963.1340 | 800.279.3288,
  2. Outside normal business hours: please contact MasterCard Customer Service at 800.654.7728. (Note:  MasterCard Customer Service can only reactivate your card one day at a time, so you may need to call back each day if you are gone over a weekend or holiday)