Cryptocurrency exchanges and shifting services Relatively simple to use, competitive fees More and more exchanges require proof of ID, virtually impossible to buy crypto with fiat currency without providing proof of ID On the vast majority of cryptocurrency exchanges, using fiat currency to buy cryptocurrency without ID is impossible. Verify your Email and Phone Number 9. Once the seller confirms payment, BitQuick releases the bitcoins to the buyer. Users agree on a trade price, and the seller hands over bitcoins to BitQuick that then acts as escrow.