Changenow scam exchange will arbitrarily seize deposits and demand KYC from users. If you dont want to submit your documents to Russian gangsters, it is best you avoid this exchange. Anonymous exchange is no good if they seize funds and act in a decentralized way. If you deposit here, consider your funds lost. Read here what they did to this user:

https://www.reddit.com/r/cryptocurrencyscams/comments/933g5j/changenowio_scam_illegally_holding_of_100_bch_11/