Being the CAGs that we are, we all jump on a good deal faster than you can say "backlog". However, that can have its consequences, especially if you're buying from third-party sellers on Amazon and eBay.
Case in point, there are counterfeit Wii U Pro controllers being sold at lower prices than MSRP but still advertised as the real deal. You can read all about it here (not my blog).
Here's some comparison pics (XL screenshots alert):
What I would like to confirm (and will happily update the topic after someone does confirm it) is that even legit controllers have a typo on the printed label on the back of the controller. Instead of "received", it says "recieved"on the second to last line right above the "For consumer service" square.
I bought mine directly from Amazon (sold and shipped by) and it has the label with the typo. Some people on other forums are saying that the ones from Best Buy have the same thing.
Let's help each other!