If so, check it carefully - because it might be worth a lot more!
If it has this design on the back of it, your coin could be worth 40 times its face value, leaving you quids in.
The "incredibly rare" coin was designed by artist Christopher Le Brun for the 250th anniversary of the Royal Botanic Gardens at London Kew in 2009.
Bearing the dates 1759 and 2009, there were only 210,000 of the coins produced, meaning that one in 300 of us have one - and that dealers are itching to get their hands on them.
They're willing to pay at least £20 for the coins - so keep your eye out!
The spokesperson said: "Now that people know just how rare this particular coin is, we expect them to disappear from circulation fast."
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