Diners Club CanadaProfessional CardsCorporate ProductsClub Rewards and BenefitsCustomer Service

If you forgot your user ID, Corporate and Professional Cardmembers can contact Customer Service at 1-800-363-3333 (24 hours a day, 7 days a week) or re-register to obtain a new user ID.

Corporate Program Administrators

If you forgot your user ID to access Secure e-Account Manager, please contact Client Services at 1-800-663-1527 (M – F, 8 a.m. – 8 p.m. ET)