Free e-mails are easy to setup than domain names/web sites. Any order from a free e-mail service must alert you (+1 fraud score). Fraudsters will try to hide after a free e-mail service.
Phone Verification Tags
add phone verification to your website
automated phone verification
automatic phone verification
bridging online and offline world
calling the customer
call in phone verification
chargeback
coupon validation
customer verification
digital goods
fax
fax notification
Fraud
Fraud Elimination
Fraud Prevention
fraud protection
Lead Verification
magento
module
One Time Password
Online Business
opencart
order confirmation
OTP
phone confirmation
Phone Type
Phone Verification
plugin
reverse phone verification
Reverse SMS Verification
Securing Web Business
sms verification
text verification
transaction verification
two factor authentication
Universal Access Number
user verification
VBulletin
verification service
Voicemail (Geographic) Number
Web to Fax
whmcs
Wordpress
Worldwide SMS
zero cost custom message