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Sending OTP (One-Time Password) is a process of generating a unique code that is valid only for a single login session or transaction. This code is sent to the user's registered mobile number or email address for verification purposes.

OTP is commonly used as an additional security measure to protect online accounts and transactions against unauthorized access or fraudulent activities.

To send OTP, an application or system should have the necessary infrastructure and protocols in place. Generally, businesses use third-party services or APIs to generate and send OTP to their users. These services may charge a fee for each OTP sent or offer subscription-based plans.

There are different methods to send OTP, including SMS, email, voice call, and mobile app notifications. In some cases, biometric authentication, such as fingerprint or face recognition, can also be used to generate OTP.

The OTP generation and sending process should follow industry standards and best practices for security and privacy. For instance, the code should be random and complex enough to prevent brute-force attacks, and the data should be transmitted securely over an encrypted channel.

Overall, sending OTP can improve the security of online transactions and reduce the risk of data breaches or identity theft for both users and businesses.