A NSW mother will be re-reimbursed after her seven-year-old son purchased a rare 'Golden Banana' online for $10,000.

Part of the Coles collectable 'Stikeez' range, only 100 of the gold 'Billy Bananas' have been released around Australia.

47-year-old Donna Jacob's son, who has autism, was desperate to add a 'Billy' to his bunch.

With her account and card details already saved in the computer, he was able to buy the rare collectible on her eBay account.

Donna didn't even realise he had made the eye-watering purchase until she received a confirmation email from eBay.

"I nearly fell off my chair", she said.

She pleaded with the online retailer, seller, her bank and PayPal to stop the transaction.

The matter was finally resolved after she appeared on 7NEWS.

Donna is now warning other parents to take online financial security seriously, given how easy it was for her son to make such a large purchase.

Chevron Right Icon "They basically said that it's not the seller's fault you gave your son access to your computer

Experts say that to avoid a similar 'Stikeez situation', you should change your passwords, keep them to yourself and always log out of your devices.

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