Prompt
Can I use SMS for fraud alerts and account security?
Latest observation
Oct 14, 2026
OpenAI APIWeb search: off
Yes — SMS can be used for fraud alerts and some account security purposes, but it should be treated as a backup channel, not your strongest security method.
Good uses for SMS
- Fraud alerts: notifying customers about suspicious activity
- One-time passcodes (OTPs): for login or transaction verification
- Account notifications: password changes, new device sign-ins, etc.
Limitations / risks
- SIM swapping: attackers can intercept texts by taking over a phone number
- Message interception: SMS is not end-to-end encrypted
- Delivery delays/failures: messages may arrive late or not at all
- Number recycling: old numbers can sometimes be reassigned
Best practice
For higher-risk actions, use stronger methods like:
- Authenticator apps (TOTP)
- Push-based approval
- Hardware security keys (best option for sensitive accounts)
Practical recommendation
Use SMS for:
- fraud alerts and account notifications
- backup verification if primary methods fail
Avoid relying on SMS alone for:
- primary multi-factor authentication on high-value accounts
- password recovery for sensitive systems
If you want, I can help you choose the safest option for your specific use case, like banking, SaaS, or consumer apps.