<Admonition type="caution">

To keep SMS sending costs under control, make sure you adjust your project's rate limits and [configure CAPTCHA](/docs/guides/auth/auth-captcha). See the [Production Checklist](/docs/guides/platform/going-into-prod) to learn more.

Some countries have special regulations for services that send SMS messages to users, (e.g India's TRAI DLT regulations). Remember to look up and follow the regulations of countries where you operate.

</Admonition>
