Alda Curtis, who earned US$1 for the T-shirt she sold on RedBubble, had US$600 removed from her PayPal account without explanation

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Alda Curtis, a 63-year-old counselling student from Sydney, set up a Redbubble store as a hobby, including selling a T-shirt featuring an unhappy cat cartoon.

After years of running the store, a single sale of that T-shirt resulted in a US$100,000 default judgment against her for infringing on the trademark of Grumpy Cat late last year. Then Curtis noticed nearly US$600 had been taken from her PayPal account.

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