Mail a Cancellation Notice from a Webhook
Use a webhook request as the handoff from another system to a prepared mailed notice.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Send Letter
Tool to send a letter via u.s. mail with specified recipient, sender, and pdf. use after confirming recipient and document details. example: send letter(to name='john doe', to address='123 main st, ...', file url='https://...')
Why this helps
Cancellation information may arrive outside the calendar, leaving you to remember to create and send the paper notice yourself.
- Start the workflow from an HTTP request.
- Pass cancellation context into the automation prompt.
- Use a confirmed recipient and PDF for the Docupost letter.
Setup
Build it in a few focused steps.
- 1Connect Docupost once in the Notis portal.
- 2Create an automation in Automations, then choose New Automation and give it a name.
- 3Tell Notis to send the prepared cancellation PDF to the confirmed recipient when the webhook request arrives.
- 4Pick the Notis webhook trigger and choose where run reports should go.
- 5Test by sending one real example HTTP request and confirming the letter details.
Questions about this workflow
What starts this workflow?
An HTTP request to the Notis webhook starts it. The external system must send the request and any needed context.
Does the webhook automatically provide a mailing address?
Only details included in the request or otherwise supplied to Notis are available. The Docupost action needs confirmed recipient and sender details and a PDF URL.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Calendar to Docupost. A trigger fires from one place; an action lands in another.
Google Calendar triggers
Docupost actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Send Letter
Tool to send a letter via u.s. mail with specified recipient, sender, and pdf. use after confirming recipient and document details. example: send letter(to name='john doe', to address='123 main st, ...', file url='https://...')
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Send Postcard
Tool to send a postcard via u.s. mail with specified recipient, sender, and front/back images. use after confirming recipient addresses and design urls. example: send postcard(to name='john doe', ..., front image='https://...', back image='https://...')
Attendee Response Changed
Polling trigger that fires when any attendee's RSVP changes to accepted, declined, or tentative. Returns attendee info and current status.
Event Canceled or Deleted
Triggers when a Google Calendar event is cancelled or deleted. Returns minimal data: event_id, summary (if available), and cancellation timestamp.
Event Starting Soon
Triggers when a calendar event is within a configured number of minutes from starting. Returns event details, time remaining, attendees, and join links when available.
Calendar Event Changes
**SOON TO BE DEPRECATED** - Use Calendar Event Sync (polling trigger) instead. Real-time webhook trigger for calendar event changes. Returns event metadata only. For full event data, use Calendar Event Sync (polling trigger).
Event Created
Polling trigger that fires when a new calendar event is created. Returns event ID, summary, start/end times, and organizer info.
Calendar Event Sync
Polling trigger that returns full event data including details, attendees, and metadata. For real-time notifications with basic info, use Calendar Event Changes (webhook).
Connect any two apps with Notis in the middle.
Google Calendar and Docupost, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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