//Request example:

http(s)://yoursite.com/billing/?command=check&account=000000

//Response example:

<?xml version = "1.0" encoding = "UTF-8"?>

<response>

<result> 0 </result>

<info>

<extra name = "Full Name">some_full_name</extra>

<extra name = "Address">some_address</extra>

<extra name = "Debt">some_debt</extra>

<info>

<comment> OK </comment>

</response>