So I was making a shop with ShopKeepers plugin where I wanted the player to turn in a 500$ bank note to get an item. The problem with it is that when I went to turn in money, it didn't work. This is probably due to the fact that the money that you need to trade was signed off by the server, but the money I was trying to trade was signed by me. If there is any way this could be fixed please let me know!