You can never ever prove a machine is home use only. I love it when people try and produce the receipt as proof, last time I checked, operators get receipts when they buy games as well.

You can tell a game is HUO but not prove. Drilled? Coin door wear? Shooter lane wear? Overall condition? Overall cleanliness?

Any combination of factors and others depending on the game.

I disagree. Maybe if you personally know the person. But really, operators get the box and a receipt. If you have first hand knowledge of the person then yes, you can "prove" it to yourself. But try and sell it HUO, unless I know you personally, your "proof" is meaningless.

Besides, I don't think the spirit of the thread was asking the question about people who have first hand knowledge. Unless you know the person the game is coming from, a receipt and a box don't prove a thing.

Condition is the proof.