OTP SMS / Transactional SMS plays a pivotal role in conveying crucial and time-sensitive information to customers. Unlike promotional or marketing messages, transactional SMS is specifically designed to respond to user-initiated actions or events.
The Transactional High Priority SMS is crafted with the primary goal of informing mobile users about any transaction related to their accounts. Alerts and updates falling under this category are treated as Transactional Route messages.
In the High Priority route, SMS messages are delivered within 5 seconds through multiple GSM operator gateways.
This category encompasses Personal Account Information, Alerts, and Update messages explicitly requested or opted in by the recipients.
Transactional SMS ensures delivery to all mobile numbers 24/7 with a DLT Sender ID of 6 characters (ALPHA) only, adhering to DLT Templates or Business Process guidelines.
These messages serve a vital purpose for the user and are commonly known as Service Alert Messages. Client compliance requires the submission of KYC documents, along with other TRAI-mandated documents, to avail Transactional SMS. These messages strictly convey information without any promotional or marketing content.
For example:

1. Order confirmations and delivery updates: E-commerce businesses use transactional SMS to inform customers about the status of their orders, including order confirmations, shipment tracking details, and estimated delivery dates.
2. Account notifications: Banks and financial institutions utilize transactional SMS for alerts and notifications regarding account balances, transactions, payment reminders, and security-related information.
3. Appointment reminders: Service-based businesses send transactional SMS to remind customers of upcoming appointments, including date, time, and any necessary instructions.Service-based businesses such as healthcare providers, salons, or fitness centers send transactional SMS to remind customers of their upcoming appointments, including date, time, and any necessary instructions.
4. Password resets and OTPs: Transactional SMS is employed for delivering one-time passwords (OTPs) for user authentication, password resets, and account verification.Transactional SMS is often used to deliver one-time passwords (OTPs) for user authentication, password resets, and account verification purposes.
5. Flight or travel updates: Airlines and travel agencies inform passengers about flight delays, cancellations, gate changes, or booking confirmations. Airlines and travel agencies send transactional SMS to inform passengers about flight delays, cancellations, gate changes, or booking confirmations.
6. Service updates: Customers are notified about service outages, maintenance schedules, or any changes in service availability. Informing customers about service outages, maintenance schedules, or any changes in service availability.
7. OTP (One-Time Password) verification: Temporary passwords or verification codes are sent for user authentication during account registration, password resets, or other security-related processes.Sending temporary passwords or verification codes to users for authentication purposes during account registration, password resets, or other security-related processes.
8. Subscription or membership alerts: Customers receive updates about subscription renewals, membership expirations, or changes in subscription plans.Updating customers about subscription renewals, membership expirations, or changes in subscription plans.
9. Important alerts: : Critical notifications, such as emergency alerts, account security warnings, or important announcements from the business or organization.Sending critical notifications to users, such as emergency alerts, account security warnings, or important announcements from the business or organization.
10. Travel updates: Airlines, railways, and travel agencies use transactional SMS to provide customers with flight or train schedule changes, booking confirmations, seat allocations, and other travel-related information.