Members from Costco and BJ's can renew at the register or at the service desk, on line or have automatic deduction from checking account for the yearly renewal. The only reason I am familiar with this process is because I am a member at both businesses.
If it had been important to him, he would have told you what to do w/it. Evidently, he's not worried about it. File 13 is calling for that renewal notice. LOL!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.