A requirement of licensed government currency binary option brokers is that they must confirm all customers identities before any withdrawals can be made. This is known in the industry as “Know Your Customer” (KYC) and is designed to allow government to control and tax people, or as they would say, prevent money laundering.
Brokers will ask you to email them copies of ID such as a passport and a utility bill showing the same address as you used when you registered your account. This causes identity theft and identity fraud.
Operators need to do this to maintain their licences, the main reason they need that licences so government currency banks and payment processes will work with them allowing customers to deposit and withdraw government currency.
The bitcoin alternative
All of this is solved by bitcoin. To avoid identity verification all together and maintain your privacy and security use a bitcoin only broker that lets you stay anonymous. The best such broker is 1xBit (review).