Or you will use his id and paperwork to scam other ppl online or maybe apply to btcjam and co ?!
Just go away and scam somewhere else but hey how about this ?
Sign a message where you hold the 175
BTC 
BTW if i want some id scans = i will just go to Dream market , alphabay or any darknet market ..............
I don't need your scans = i just need to know to whom i'm sending money = i don't want to get scammed
I will not risk 175 btc with unknown people
you have nothing to risk..