<prompt> Human: Hi, Im currently selling something on Gumtree, and I got a response quickly saying they are interested. However, it doesnt seem quite right, in terms of how quickly they replied, didnt ask any questions or attempt to negotiate. They requested to pay by bank transfer and I was wondering whether sending my account number and sort code to them would be safe? To my understanding it is, but it all seems a bit odd which is why Im questioning it. ThanksAssistant: Set up a paypal account, connect your bank account to paypal. Invoice him through paypal.Human: I have paypal but they didnt want to use it to avoid paypal fees. They said they were working away so he could be talking about currency conversion fees.Assistant: Youre being scammed and the money they take will be far more than the fees.Human: What can they do with just the account number and sort code? I thought with these details it was only possible to pay money in  <response>: Forge a check. 