If you have a problem with a payment – for example, if the money doesn’t arrive – your first step is to contact your bank.
Your bank won’t be able to stop the payment if it’s already been made. Keep a record of all correspondence you have with your bank while sorting the problem. And make a note of the error, including the date it was made and the bank details you sent the money to.
Your bank will start investigating within two working days of you telling them about it – it doesn’t matter if the error didn’t happen recently.
After the bank investigates, your money should be returned within 20 working days. If it’s clear it was a genuine mistake, your bank will contact the bank you mistakenly sent the money to get your money back.
If there are issues – for example, if the person you accidentally sent it to refuses to return it – your bank will let you know the result of their investigation within 20 working days from the date you reported the error.