Credit Card Services Lost and Stolen Reporting 800.966.7353 (7am-6pm ET, M-F and 9am-5pm ET, Sat) to reach the Self-Help CU member services call center 888.241.2510 after hours and on weekends to reach Card Member Security 909.941.1398 from a non-mobile phone line when you're outside of the U.S. (this will be a collect call) Go to our Lost or Stolen Card Page to file a report. Payment Methods Online banking Mobile banking Audio banking Recurring transfers (contact our call center for more information - 800.966.7353 Mail (view your statement for mailing details) Mastercard Assistance Identity Theft Alerts. Click on the text link to enroll via the Mastercard website. Mastercard Global Services: call 800-627-8372 Agreement Credit Card Account Agreement