The License Verification Form is used to record which server application licences with SA have been assigned to Azure virtual machines or to Service Provider’s shared hardware.
The latest form is dated June 2015 and has been updated for Skype for Business: http://bit.ly/1E6vPsV.
If you want to learn more about the whole licence verification process then this customer guide is a useful resource: http://bit.ly/1o9hNAQ.