The Telephone Verification service can be implemented as an independent service or can be used in conjunction with minFraud for optimum protection. Businesses can customize the Telephone Verification service as well. For example, the setting can be adjusted on the client side so that your system requires a telephone verification only from customers who are using free e-mail addresses or orders that have a score above a certain minFraud threshold value. The threshold values can be re-adjusted at any time.

To see how Telephone Verification can be integrated into the payment process, refer to the following diagrams:

Telephone Verification flowchart PDF, HTML
Telephone Verification with minFraud flowchart PDF, HTML

HTTP Interface
For automated access, the service is available through an HTTP interface. We offer PHP, Java and Perl APIs to access the Telephone Verification service.

A sample HTTP request is given below:
https://www.maxmind.com/app/telephone_http?l=YOUR_LICENSE_KEY&phone=PHONE_NUMBER&verify_code=1234

Any plus sign '+' must be URL escaped. That is you should replace '+' with '%2B' in PHONE_NUMBER.

Note that you can also set a delay_time parameter to a numeric value between 0 and 30, specifying the number of minutes the verification call should be delayed. If you send a 0, there will be no delay.

You can also set a language parameter to Arabic, Cantonese, Croatian, Czech, Danish, Dutch, englishuk (British English), Estonian, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Italian, Japanese, Korean, Mandarin, Norwegian, Polish, Portuguese, portugueseeu (European Portuguese), Romanian, Russian, Slovakian, Spanish, Swedish, Thai, Turkish, Ukrainian or Vietnamese. The default language is English. A sample HTTP request for a French recording is given below:
https://www.maxmind.com/app/telephone_http?l=YOUR_LICENSE_KEY&phone=PHONE_NUMBER&verify_code=1234&language=French