Renewing an expired membership is easy. Just go to https://members.cnu.org/memberships and choose your membership level. Update your contact info if anything has changed, and pay the membership fee. You should receive a welcome packet by mail within a month of renewing. Please note, while the link says “join,” it is also the link for renewal, and your past records will automatically be detected, as long as you use the same email address (you can update your email preferences by logging in to members.cnu.org).
Even if your membership is not yet expired, when a membership is paid for in the system, it will add the additional 12 months on to your existing time.