Send overdue invoice reminder letters from your Notion finance tracker
Record the overdue item once in Notion and let Notis prepare the approved reminder letter for Docupost.
Trigger
New Page
Triggers when a new page is added to a Notion database.
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
Payment follow-up is easy to postpone when the founder has to notice an overdue item, draft a message, and switch tools to mail it.
- Make follow-up visible from the finance workflow.
- Reduce time spent composing repeatable reminders.
- Keep wording consistent and professional.
Setup
Build it in a few focused steps.
- 1Connect Notion and Docupost to Notis once in the portal.
- 2Create an automation with an instruction to send the approved reminder letter for each new overdue invoice record.
- 3Select New Page for the invoice database and choose a channel for run reports.
- 4Test with one real overdue invoice and confirm the recipient, amount context, and PDF before sending.
Questions about this workflow
Will a new invoice page always be overdue?
Use a database dedicated to overdue items or state the overdue condition clearly in the instruction. Test the workflow with a real example before relying on it.
Can the letter include invoice details?
Ask Notis to use the relevant information in the Notion record and approved letter document. Review the recipient and content before the first send.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Notion to Docupost. A trigger fires from one place; an action lands in another.
Notion 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://...')
All Page Events
Triggers when any Notion page is created or updated across the workspace.
Comment Created
Triggers when a new comment is created in Notion. Optional `page_id` filter scopes to comments on a specific page. When omitted, fires for any new comment in the workspace the integration has access to. Requires the 'Read comments' capability on the Notion integration. If a connection was authorized before that capability was enabled, the user must re-authorize the connection for comment events to flow.
New Comment
Triggers when a new comment is added to a specified Notion block or page.
Database Created
Triggers when a new Notion database (the container) is created. A database is the post-2025-09-03 container that holds one or more data sources. This trigger fires for the container's creation event (`database.created`), distinct from `NOTION_DATASOURCE_CREATED` which fires when a new data source is added to an existing database. Most customers calling Notion's `POST /v1/databases` (the legacy API) or creating a database via the Notion UI will see this event. Adding a new data source to an existing database fires `data_source.created` instead — use `NOTION_DATASOURCE_CREATED` for that. Notion's payload puts `entity.type: "block"` (the container is a `child_database` block in the content tree) and `entity.id` is the database id.
Data Source Created
Triggers when a new Notion data source is created. Fires workspace-wide. The payload's `data.parent` carries the data source's tree parent (typically the teamspace) for downstream filtering. A single template-based database creation can fire multiple `data_source.created` events at once — one per data source the template instantiates.
Data Source Schema Updated
Triggers when a Notion data source's schema is updated. Fires on column add / remove / rename. Payload includes `data.updated_properties: [{id, name, action}]` so consumers can discriminate the kind of change downstream. Optional `data_source_id` filter scopes to schema changes on a single data source. When omitted, fires for any schema change in the workspace the integration has access to. Note: adding a column also fires `page.properties_updated` once per existing row in the data source. Customers wanting a single structural-change signal should use this trigger.
Connect any two apps with Notis in the middle.
Notion and Docupost, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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