> For the complete documentation index, see [llms.txt](https://help.activenow.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.activenow.io/en/communication.md).

# Communication

This section covers everything related to communicating with participants — sending messages manually, setting up automatic reminders, and monitoring notifications. Use the guide below to find what you need.

## Sending messages

**Want to send an SMS or email to selected participants?** → [Sending SMS and Email to Participants](/en/communication/sending-sms-and-email-to-participants.md)

**Want to check whether a message reached a participant?** → [Checking If a Message Reached a Participant](/en/communication/message-delivery-statuses.md)

**Having trouble sending emails from the system?** → [Troubleshooting Email Sending](/en/communication/troubleshooting-email-sending.md)

**Want to buy an additional SMS package?** → [Buying an Additional SMS Package](/en/communication/buying-additional-sms-package.md)

**A participant says they didn't receive an email?** → [Email Not Delivered to a Participant](/en/communication/email-not-delivered-to-participant.md)

**A participant says they didn't receive an SMS?** → [SMS Message Not Delivered to a Participant](/en/communication/sms-not-delivered-to-participant.md)

## Automatic reminders

**Want to automatically remind participants about upcoming make-up lessons?** → [Reminders About Upcoming Make-up Classes](/en/communication/automatic-reclaiming-reminders.md)

**Want to automatically remind participants about upcoming individual lessons?** → [Reminders About Upcoming Individual Lessons](/en/communication/individual-lesson-reminders.md)

**Want to automatically remind participants about outstanding payments?** → [Reminders About Outstanding Payments](/en/billing/automatic-payment-reminders.md)

**Want to encourage participants to register in the Client Panel?** → [Reminders About Registering in ActiveNow](/en/communication/activenow-registration-reminder.md)

## Automatic notifications

**Want to be notified when a participant misses several lessons in a row?** → [Notifications About Participant Absences](/en/communication/high-churn-potential-clients-report.md)

**Want to be notified about participants with the highest arrears?** → [Notifications About Clients with High Arrears](/en/communication/clients-with-high-arrears-report.md)

**Want to receive notifications about newly starting courses?** → [Notifications About Newly Starting Courses](/en/communication/automatic-new-course-reminders.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://help.activenow.io/en/communication.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.