<prompt> Human: Seeing many articles from people who accidentally receive thousands or millions from an error with a loanpayment. What would happen if the money was not quickly spent on consumer products, rather it was invested and turned into a profit before the bank had noticed? Would the money loaned simply be taken back without any more questions asked? Would all the money including the profit be taken back? Or perhaps even the police become involved? Here is the latest one Ive come across.  <response>: asking for a friend.You have to give back the money you received in error. You would not have to give back the investment gains. But if there were investment losses, youd have to make those up. 