I don't remember my registered Challenger membership email address. What should I do? July 03, 2023 12:05 Updated Contact us here to retrieve, update or amend your email address. For verification purposes, please include: Full name Date of birth Registered email address Registered contact no. Related articles How do I update my particulars or details? How much does it cost to sign up/ renew as a Challenger member? How do I sign up as a Challenger member? What is Challenger MVIP membership? What is associate membership?