I got the same nonsense request to submit PDF from them.
My assets have been parked there for several years, not doing anything, no big moves, no suspicious influxes or anything. All my assets are legit, but it's not like I can "prove" much, since mtgox, bitfloor, and so many exchanges where I got coin from simply do not exist.
They did not even have the decency to send me the PDF directly. I need to log into their portal? I can't tell if the portal site is legit at all or a phishing attempt..
I hate to pull my assets off because of the diversity of coins and having to hunt down and manage wallets for them all. Jesus.
I guess this bs is inevitable.