I know the one I got was a fake because the fabric was shit, it had that classic bootleg red banner tag (the one with no barcode and no black shadow on the letters), and the details and tag were poorly sewn.
Here's what the seller sent me in an email:
"I wanted to follow up to get your insight because I noticed that feedback was left for this item claiming that it was not authentic and so I wanted to see if you could help give me more information on this ... I have pulled the product from our inventory and will monitor to make sure that no other items get listed because we certainly only want to offer official products and this is frustrating because we told our buyer rep the exact same thing and he assured us that this item did include both the tag sewn into the doll and the hang tag that had the official pokemon logo and trademark.
Any information you have on how we can better identify and know which products are legit would be helpful because we can keep an eye out for different merchants that only offer dolls that fit that specific criteria ...
Also, please accept our sincerest apology .... we would never have purposely offered or sold you something fake and feel as mislead on this entire transaction as you since we received an incorrect item from our suppliers."
So other than the tag being wrong, what kinds of things can I tell them to help them identify the fake umbreons? The tush tag itself is the american pokecenter tag with a copyright of 2010, so any comparison pics and stuff for what tag it's supposed to have, as well as what the correct release is would help. So far, of all the pokedolls I've bought on Amazon, only the Umbreons have been fake, where as all of the reviews on this particular one claimed it was legit :/
I think that some of the sellers don't sell fakes intentionally, and this could help with making sure that at least one more seller will be able to stop selling fakes and be more aware of their product.