Send invoice letters from updated Google Tasks
Move invoice mailing forward as soon as the task has the final details.
Trigger
Task Updated
Triggers when an existing task is updated in a Google Tasks list. This trigger monitors a specific task list and fires when tasks are modified.
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
Invoice tasks often change after review, creating another manual mailing step.
- Mails final invoice versions
- Reduces administrative repetition
- Keeps billing tasks actionable
Setup
Build it in a few focused steps.
- 1Connect Google Tasks and Docupost in the Notis portal.
- 2Create an automation for invoice letters.
- 3In one instruction, tell Notis to send the confirmed invoice PDF and verify the recipient before mailing.
- 4Pick Task Updated as the trigger.
- 5Choose a report destination and test with one updated invoice task.
Questions about this workflow
Can the workflow wait for a final version?
Yes. Instruct Notis to send only when the task indicates the invoice is final and the PDF is available.
Does it send digital invoices too?
This workflow sends a physical letter through Docupost.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Tasks to Docupost. A trigger fires from one place; an action lands in another.
Google Tasks 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://...')
New Task Created
Triggers when a new task is created in a Google Tasks list. Uses timestamp filtering (updatedMin) to efficiently detect new tasks.
New Task List Created
Triggers when a new Google Tasks task list is created. This trigger monitors Google Tasks and fires when new task lists are detected.
Task Details Changed
Triggers when a specific task's details change. This trigger monitors a single Google Task and fires when any of its details (title, notes, status, due date, completion, position) are modified.
Task List Changed
Triggers when a task list changes (title or content updates). This trigger monitors a specific Google Tasks list and fires when changes are detected.
Task Updated
Triggers when an existing task is updated in a Google Tasks list. This trigger monitors a specific task list and fires when tasks are modified.
Connect any two apps with Notis in the middle.
Google Tasks and Docupost, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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