Why is a gym allowed to demand such documentation in the first place?
But yeah, if I didn't have proof that I moved, I would have been stuck in the contract forever.
I of course realized this around 2 weeks before the next billing cycle, so I would have been forced to pay for the whole year if I didn't show that I was leaving the city.
So I certainly have some blame to my name for not having read the contract more carefully... it just all seemed a bit crazy at the time for a gym membership.