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Overview

Sometimes you only want to trigger a flow for specific envelopes—not all envelopes in your SignatureAPI account. In this example, we’ll trigger a flow only for envelopes created by the Sales Department. These envelopes use the topic sales_department. This guide shows how to filter envelopes that trigger a flow in Power Automate. You’ll learn how to set up a trigger that fires only for envelopes with a specific topic.

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Creating the Envelope

This guide assumes you already have a Power Automate flow that creates and starts envelopes using the “Create an envelope” action from the SignatureAPI connector. Make sure that flow includes a topic in the “Envelope Topics” field under Advanced parameters. In this case, use the topic sales_department. Envelope topics

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Trigger a Flow for Selected Envelopes

Let’s create an automated flow in Power Automate that starts when a deliverable is generated.
  1. Go to Power Automate and select Automated Cloud Flow.
  2. Name your flow and choose the trigger “When a deliverable is generated” from the SignatureAPI connector.
Trigger
  1. In the “Topics” field of the trigger, enter sales_department. This filters the trigger to only fire for envelopes with this topic.
This works like a labeling system. Only envelopes tagged with a matching topic will trigger the flow. This let you route envelopes to different flows based on their topics.
Filter

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Continue the Flow

Now add the actions that follow the trigger.
  1. Add the “Get a Deliverable” action.
  2. Use dynamic content to select the correct Deliverable ID from the trigger.
Get deliverable
Next, send an email to the correct department.
  1. Add the “Send an email” action from the Microsoft Outlook connector.
  2. In the “To” field, enter the department’s email address.
  3. Attach the signed contract file using the “File Content” from the “Get a Deliverable” action. In this example we used the envelope ID as the file name, but you can use anything you want, just include the .pdf extension.
Send email

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Result

This flow will run only when a deliverable is generated for envelopes with the topic sales_department. It will get the signed document as a PDF file and send it by email to the correct department.

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Test Your Automation

Test the full workflow:
  1. Save your Power Automate flow.
  2. Create a new envelope with the topic sales_department.
  3. Sign the document.
  4. Check that the correct email is received with the signed PDF attached.

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