This could be driver's license, passport, or any other kind of official document of the concerned trader. (cryptocoinjudge.com)
To register, the insurer must be given the nominee details like full name as in official documents, age, address, and relationship between the policyholder and the nominee. (policybazaar.com)
This includes letters or official documents from state real estate commissions, local chamber of commerce, or notable business organization or association. (rliland.com)