I have just sold an item that I listed as collection only, but the buyer wants to send a courier to collect it instead, which I am ok with. The buyer has paid for the item, but I guess I won't see the money in my account until they send me the code that they would have shared with me when they were collecting it in person. Should I ask for the code before I let the courier take the item so that the money is released? Otherwise they could say their courier never delivered the item etc.