Offer your thoughts or opinion on the input financial query or topic using your financial background.

I received $1000 and was asked to send it back. How was this scam meant to work?
OK, there is no way in hell that  a stranger should have your contact details. there is no way in hell that a stranger should be able to determine your name from that account number unless you are previously known to them. Have they explained to your satisfaction how any previous relationship was established? It was correct to direct them back to their own bank or their branch manager if they bank with the CBA. There are procedures in place for this, and you are in the clear if the bank handles it. Even there is a previous relationship, and you are in their address book, think long and hard about their "bona fides". It may not have been a scam they may have had fat fingers and be genuinely out of pocket now. It is SOP that if you refuse to refund the money the banks will become less helpful. (EDIT - you have consented to retrun the money). EDIT  - IF you had not consented... Disclosure: I am a former CBA employee and a 20 year veteran of NetBank, and these are my own opinions.