Title: Voice OTP

URL: https://www.infobip.com/voice/otp

# Authenticate customers globally with Voice OTPs

Provide a convenient and secure verification process with the most inclusive communication channel.

[ Contact us ](/contact)

## Experience the benefits of Voice OTPs

Using an established and reliable channel for OTP messages has functional, performance, and cost advantages.

##  Maximize reach for authentication messages 

 Ensure the reliable delivery of personalized, automated security messages directly to mobile handsets and landlines in almost any global destination.

##  Provide user choice

 Incorporate Voice as part of your wider 2FA process to give flexibility to users in how they receive authentication messages – to increase accessibility and engagement.

##  Prevent fraud 

 Benefit from the security of Voice OTPs which reduce the chances of unintended recipients receiving the message. Only pay for answered OTP calls and reduce the impact of spam attacks.

## Send one-time PINs (OTPs) using Voice messages API 

Send OTPs to users via a configurable voice message that is read out loud when they pick up the phone.

- Flexible configuration options for an optimal user experience
- Adjust the speech rate to give time for users to enter the OTP code
- Allow users to easily replay voice messages
- Add pauses to make the speech pattern sound more natural

![](https://cdn-web.infobip.com/uploads/2025/02/voice-otp-process-step.svg)  STEP 1 

##  Login

 The customer logs into their account with a username and password.

![](https://cdn-web.infobip.com/uploads/2025/02/voice-otp-process-step-1.svg)  STEP 2 

##  Choosing channels

 A screen is displayed offering them a choice of channels for the delivery of an OTP to authenticate them.

![](https://cdn-web.infobip.com/uploads/2025/02/voice-otp-process-step-2.svg)  STEP 3 

##  A phone call

 The customer opts to receive a phone call.

![](https://cdn-web.infobip.com/uploads/2025/02/voice-otp-process-step-3.svg)  STEP 4 

##  Code

 The automated call reads out a code.

![](https://cdn-web.infobip.com/uploads/2025/02/voice-otp-process-step-4.svg)  STEP 5 

##  OTP

 The customer inputs the OTP from the call into the website/application

## Use a secure and flexible channel for sending OTPs

<tabs>
<tab label="Authenticate registration">
## Authenticate registrations

Verify people registering for your services by sending OTPs on the Voice channel.
</tab>
<tab label="Password resets">
## Password resets

Reduce the risk of account take-overs by sending Voice OTPs when a customer requests a password reset – particularly when they have been inactive for some time. 
</tab>
<tab label="Authenticate transactions">
## Authenticate transactions

Secure your customers transactions and protect your business by sending OTP codes to confirm that transactions are legitimate – without adding friction to the process.
</tab>
<tab label="User reactivation">
## User reactivation

If a user signs into their account after a long period of inactivity, authenticate their identity using Voice OTPs to ensure that they are who they claim to be.
</tab>
</tabs>

###  Start using Voice for verifying users and transactions.

 [ Contact us ](/contact) 









 ![](https://cdn-web.infobip.com/uploads/2024/12/infobip-people-woman-texting-1.jpg)