<prompt> Human: Update---Throwaway. It is an odd number abc,xyz.xd, so its not as simple as adding an extra zero and calling it a mistake.The bank also called me up and asked me to move the money in an account that has a higher interest rate than my current one. So instead of getting 100 per month, Id be getting 400-700 per month.What should I do?Im in NSW, Australia. 22 years old, no student loan, didnt go college, finished high school. Just been working. No car, no debts. Still live with my parents and dont pay rent, but help out with groceries once in a while...Please advise on what I should do? Thank you in advance.--EDIT: post is locked due to silly comments, but pls pm if u have actual advice. thanks. also i mention a little about me because i have no reason to want to use this money as i have no financial burden. thanks for all your helpful comments.Assistant: Whatever you do, dont spend it, or the extra interest earned. It will all likely be backed out shortly. Call the bank and let them know of the mistake.Human: I called up the bank, and enquired about the transaction and they said they dont have any more information on it...  <response>: Go into the bank, physically, and talk to the highest manager of the branch. Theyll be able to call someone, probably better than you can. Dont just let this slide. Its not your money, until youve made every effort possible to give it back, return it, or solve the problem. That means everything possible. If, and only if, youve done all you can, for several months, without any holes, and have in writing from the bank that the money is yours, should you consider it actually yours.Even then, put it in a savings account and do not touch it for 5 years, expecting someone will come after it at some point, and tell no one and spend nothing. Following that, you may consider doing something else with it, preferably also just investing it for another 20 years with a professional financial advisor in control. 