some of them did not require it,but most of them did it.
just do the basic or the market that does not require your identification,
there 2 way to encash your money :
1.Selling it on the market
2.Selling it off the market,
have you try to encash your money from peer to peer platform like localbitcoin.com ?
in there you just need to find someone to buy or sell it and make an agreement with him/her.
afterward their system will provide you an escrow and do the transaction.
you do not need to send your data to the buyer or seller,
or try to encash it in this forum on Currency Exchange board :
Currency Exchange Board : https://bitcointalk.org/index.php?board=53.0