I'm not saying that, it is official statement of 1xBit support:

In accordance with the internal AML procedures the Company performs initial and ongoing personal identity verification procedures as provided by the level of risk of each User.

• The company will ask you to provide the minimal information to confirm your identity.
• The company will record and preserve all data and ID, as well as which methods of confirmation have been used and the results of verification procedures.
• The company will check your personal data to match the list of persons suspected of terrorism, which is formed by the authorized state and independent authorities. A minimum set of identification data includes: the User's full name; date of birth (for individuals); residential address or registered address of the User;
• sources of funds that you plan to Deposit into the account.

To verify and confirm the authenticity of the above-mentioned data, the Company may require the following documents:
passport or identification card, or other document equivalent that meets the following requirements:

• passport or identification card, or other document equivalent that meets the following requirements: contains the name, date of birth and a photograph of the document holder;
• issued by the national public authorities, a recently obtained receipt for the payment of utility bills (not older than 3 months) or other documents confirming the address of the User.

The company may also require other additional information, confirmed by relevant documents. In certain cases, the Company may also require not arised copies of documents from the User.