

3-D Secure is a card payment authentication protocol that adds an extra verification step during online payment, requiring the cardholder to authenticate before the payment is authorised.
When a customer makes an online card payment, they are redirected to their bank or card issuer for authentication, usually via OTP or app-based approval. Only after successful verification is the transaction processed. In India, 3DS is mandatory for most card-not-present transactions.
3DS reduces card fraud, protects merchants from chargebacks, and increases customer confidence. It ensures liability protection and compliance with regulatory standards, especially for e-commerce and subscription payments.
Businesses accepting online card payments rely on 3DS to balance security and transaction success. Clear payment routing and reconciliation remain critical for smooth operations.