How to recognize fake packs?

[Weppa]

I wondering what the best way is to recognize fake packs. Right now there is some ex unseen forces booster packs up on Swedish ebay and I wondering if its possible to see if they are real or fake? I think its a bit weird that its only have 2 different pack arts and I also think the packs looks a bit "airy" but I might be over suspicions after getting fake packs from a seller once.

http://img.tradera.com/images/305/172145305_139af165-9d63-4ac0-92e7-237fbbd6eef8.jpg
http://img.tradera.com/images/305/172145305_ac02754b-0cfb-4791-879a-605630b4f01e.jpg
http://img.tradera.com/images/305/172145305_4981bf93-276e-45a0-8b17-df2387bbdb3d.jpg
http://img.tradera.com/images/701/172142701_f145ce7d-9416-4229-8f68-dd9895d0bca0.jpg
http://img.tradera.com/images/701/172142701_eb6a9fee-224d-4453-9bb0-a013c2f71bb6.jpg
http://img.tradera.com/images/701/172142701_a9bde49d-7fb0-4684-8340-6c5e233454a0.jpg
http://img.tradera.com/images/701/172142701_7240a72f-39a9-4b98-a296-9ca779b48d1a.jpg

 

[Daelum]

The ex Crystal Guardians packs look real to me, but I am unsure about the ex Unseen Forces packs. They are international English packs, so I don't know if they are supposed to look the same or not as North American packs.

 

[homeofmew]

It's hard to see through some of the fake boosters, other packaging is more obvious, but in fake boosters the coloring is a bit off.
From the pictures they look real but might have been tampered with.
Why do I say this, looks like there are air pockets inside the booster, which in general packs are as "poofy"