For a brief moment, Ruth Balloon thought she had become a millionaire - but it lasted for just one day.
The Dallas woman had even begun to think about how to spend the $37million which was put into her bank account in a whopping clerical error.
The money - the equivalent of £27million - was put into her account by accident by LegacyTexasBank and she was forced to give it all back.
The bank said a teller had "entered her account number into the amount field by mistake."
Ruth told KTVT that, having just clocked off from work, she was given the shock of her life when she checked her bank account and couldn't believe her luck.
She said: "I was like, ‘wow, we have a lot of money!’.
"I hoped someone really gifted us with that $37 million."
For her brief moment as a millionaire, Balloon thought about just how she would spend her acquired wealth.
She told MailOnline : "First I was going to do 10% tithing. Then I was going to donate some money and then I would have invested in real estate.
"Even if the amount was a real transfer, I knew the money did not belong to us. I could not spend money that does not belong to us. I did daydream of what would I do with it if I did have it."
LegacyTexasBank said in a statement: "On Tuesday, December 10, our client made a foreign currency deposit into her LegacyTexas account.
"Due to the fluctuation in exchange rates, all foreign currency transactions must be manually entered into our system through our back office.
"When our client's deposit was being keyed in, our representative entered her account number into the amount field by mistake."
Following the error, Ruth said she wasn't going to try and keep the money, but hoped for a 'thank you' reward for being a good customer and notifying the bank.