bike repair lost

Surely someone in the store will remember you. If they make problems for you just because they can't get the ticket off you, then they are dodgy as all hell and you should ever deal with them again. Just tell them you lost it and I'm sure there won't be a problem. Probably happens all the time. They will have your name on record anyway, so at the most you should just need to show them some ID when you pick up the bike. They'll want to help you, otherwise you won't give them any money for the repairs. They don't want that. They'll know you're honest when u show them some ID, because you'd have cops knocking on your door if it turns out its someone elses bike that you've picked up. They can't lose out, so they'll do the right thing by you, I'm sure of it.