Not a very good gift unless the gifter intended it as a joke.
The world is full of people who have no knowledge of what makes a counterfeit v genuine.
This example may have been purchased and given in good faith, so the last two replies are a bit harsh IMO.
In fact, they're both unwarranted and unwanted (especially from two members who should know better).
I shall now remove my "stern schoolmaster hat" and finish my Guinness.