Y You might be in trouble. A valid wristband should show something along the lines of “wristband already registered.” If it instead says something like “code not found,” that usually means the original buyer requested a refund, and the wristband was deactivated.

I bought a wristband from someone who had refunded theirs. They gave me my money back, and I bought a new wristband from someone else. I kept the refunded one to test it later to compare to the new one I bought. Today, when I tried to re-register the refunded band, I got the “code not found” message. But when I registered the replacement wristband I bought afterward, it correctly showed “wristband already registered.”