One-time passwords (OTP) power login and transaction verification. Fast, reliable delivery is critical to conversion and security.

OTP best practices

  • Keep OTPs short (4–6 digits) with a clear expiry.
  • Use a registered Sender ID so codes aren't filtered.
  • Send over a high-priority route (SMPP recommended).
  • Handle retries and fallbacks for undelivered codes.
  • Never log full OTPs in plain text.

eSMS Africa's low-latency routes are optimised for OTP delivery across Africa.