[asterisk-biz] Preventing Fraud in VoIP Transactions

[Sergey]

Eric Chamberlain wrote:
> In other cases, we ask the customer to sign a receipt and fax or e-mail a front and back copy of the credit card, and a copy of a government issued photo id and we verify the credit card information with the issuing bank.
>   

Can you describe this procedure in details? do you have any special 
agreements with bank(s)? how often they they refuse to verify credit 
card info?