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i think it's enhance verification for KYC maybe you transferred a significant amount simply they try to look further

No, it was not that big. otherwise the account was OK with KYC.
But just did not transfer when withdrawal limit was at 0 BTC

the most important thing is everything is ok right now Congratulations

Yes, I'm very pleased with the bittrex platform @hichemfetoui

this is the man behind bittrex if he tries to make you angry just tell me :p

he is a member of the advisory bord of https://stormtoken.com/

hehe, ja :)