by law...
you have to inform the bank and ... the bank will check if there are any errors from their side and if its so... they will reveres the payment.
OR ... if they get a complaint from a customer, they will check and do the same as well.
BUT ..... ok.. here the BUT part of all this..
you can goto another branch of the same bank.. and give a standing order against your account to transfer a sum of money (in this case 10,000) to an account of ANOTHER bank tomorrow. ... this means effectively you are not touching the money since bank is the mediator , perpetrator and the victim as well.
after that money goes to the account of another bank... you withdraw it.
just saying mate

....
and you do realize I just advised you on money laundering 101 right????