Cats are notoriously sneaky – and this one is no exception.

Sir Whines-A-Lot, who lives in the office of marketing firm GuRuStu in Tulsa, Oklahoma, keeps himself extremely busy by stealing other people’s cash!

His mischievous antics were first spotted after boss, Stuart, found money on the floor.

“It kept happening, but we didn’t know why. So we decided to test a theory,” Stuart told The Dodo. “We tried sliding money through the gap in the door, and the cat hopped up and snatched it.”

Stuart presumed that the adorable kitty had become a money-stealing machine due to passersby using dollar bills as makeshift toys.

“I’m guessing the first people didn’t intend to lose their dollar,” Stuart told The Dodo. “They probably put it in to mess with him, and he snatched it. When you hold money there, he’ll bat at it playfully at first … But then all of a sudden he’ll bite it and rip it from your hand. He does it so fast, you don’t even realise what’s happened.”

As the dollars started to stack up, Stuart decided to donate the money to a homeless charity.

He says: “Sir Whines-A-Lot was homeless once, so it seems fitting,”

So far they have raised over $100, all donated under the name CASHnip Kitty, the cat’s nickname.

A truly kind gesture.