A mum found £6million in her bank which was paid by accident and bought a dream home and helped out family.
Thevamanogari Manivel expected a £60 refund from a cryptocurrency exchange.
But crypto.com mistakenly entered an account number instead of the cash payback amount.
Ms Manivel, from Melbourne, Australia, couldn't believe her luck and spent a huge amount of money on a house and sent the remainder to other accounts.
Around £800,000 was spent on a five-bedroom home as a “gift” to her sister, Thilagavathy Gangadory.
The remainder was shared between six others, including her sister and daughter.
But her good fortune changed when a routine audit by the firm spotted the error.
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Crypto.com began legal proceedings and she was ordered to pay back all the money with interest.
The firm froze Ms Manivel's accounts, but most of the cash had already gone.
Her sister also had accounts frozen a fortnight later.
Australian news site news.com.au reported James Elliott of the Victorian Supreme Court said: "Extraordinarily, the plaintiffs allegedly did not realise this significant error until some seven months later."
He ordered the cash be paid back after the property was sold with an additional 10% interest and legal fees, reports news.com.au.
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Mr Elliott said: “It is established that the Craigieburn property was acquired with funds traceable to the wrongful payment and would never have been in Gangadory’s hands if the wrongful payment had not been made.
“Thus, Gangadory was unjustly enriched by receiving the purchase price of the Craigieburn property out of the wrongful payment.
“Accordingly, I was satisfied that the orders relating to the sale of the Craigieburn property were appropriate.”
More court rulings have been made against others who received cash from the accidental payment.
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The Mirror reported in December last year how Santander accidentally paid out £130million to thousands of individuals and businesses on Christmas Day in a huge blunder.
Around 75,000 people and companies had money mistakenly deposited by the high street bank on December 25.
It happened after one-off and regular payments were made twice in error from 2,000 business accounts.
Payments included wages or money from suppliers, with the money being sent to account holders at Barclays, HSBC, NatWest, Co-operative Bank and Virgin Money.
But because the cash had been sent to accounts at rival banks, Santander had to communicate with other lenders to recover the funds.
There were also fears some customers who received double payments would have already spent the extra cash - making it harder to recover.
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Some banks were reluctant to claw the money back as it could push customers into their overdrafts.
In addition to speaking to rival banks, Santander looked at approaching some customers directly to get the money back.
Pay UK, which runs the main payment systems in the UK also held talks on how to reverse the payments.