Unfortunately and like many prepaid carriers, Visible doesn't provide full billing statements. Others having this requirement have been able to print (or screen capture) billing details from their account's payment history coupled with their account overview information (using either the app or web site) having it accepted by their employers.
Visible would do well to include name and phone number on those billing details in payment history to give the impression of a formal billing statement. Adding that shouldn't break their developement budget.
