As most digital businesses have unfortunately come to learn, International Revenue Share Fraud (IRSF) is a common and costly side effect to the use of voice calling to connect with customers. At TeleSign, we've been educating our customers about IRSF for many years as part of our efforts to combat it. It's a pretty straightforward attack that works like this:
Luckily, with this simple fraud comes a pretty simple solution.
Our Voice Verify API is an easy way for businesses to build secure account registration flows through one-time passcode delivery to end-user provided phone numbers. With other voice APIs, this process would leave businesses vulnerable to IRSF. But that's why TeleSign is known for being the communications API provider, founded on security.
To combat IRSF, we have always recommended that our customers implement our fraud risk scoring API, Score, into their new user registration flows. With Score, the end-user provided phone number is passed to TeleSign for evaluation of fraud risk before any calls are made to the phone number. Score's evaluation occurs in real-time and helps identify if a user is using the same number to create multiple accounts and if that number has associated data behind it that points to fraud.
Score has been an effective way for our customers to stop IRSF. So effective, in fact, that we decided to make it even easier to add to registration flows that utilize our Voice Verify API. Using our Voice Verify API solution, customers can now address IRSF issues by performing an optional fraud risk Score check before triggering voice transactions, using one single API request. By adding this simple step, you will be able instantly block voice calls linked to potentially IRSF-related premium phone numbers.