Automated phone call verification is the third verification layer of the :PayVerify system. If previous verification layers do not collect sufficient information for transaction approval, but at the same this information is considered not sufficient to decline it, then customer is given another opportunity to complete transaction by confirming his phone number. Automatic phone call is placed to verify cardholder's number. Customer is asked to verify provided number or change it on special webpage, and make the phone line available. After he/she presses the button "CALL ME NOW" a verification call is initiated. Customer is asked to enter randomly generated pin-code using phone keypad and record short voice authorization. Within several seconds after hang up, our system processes the call.

PayVerify collects following information related to phone verification:

- User country by phone area code,

- User city or area by phone area code,

- User phone number type (landline, mobile, cheap DID, etc.),