> ## Documentation Index
> Fetch the complete documentation index at: https://signatureapi-daf4ee54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# When an envelope has started

> This event occurs when an envelope status transitions from processing to in_progress, indicating it is ready to be sent to recipients.

<Frame>
  <img src="https://mintcdn.com/signatureapi-daf4ee54/A2M2EMKFzt1MfKWy/docs/integrations/power-automate/images/triggers/envelope-started.png?fit=max&auto=format&n=A2M2EMKFzt1MfKWy&q=85&s=7c96acbee4549b4480fe74f529a04366" alt="" width="2880" height="1624" data-path="docs/integrations/power-automate/images/triggers/envelope-started.png" />
</Frame>

### Input

<ParamField path="Topics" type="array of string">
  Use to classify envelopes and filter webhook notifications.
</ParamField>

### Output

<ResponseField name="Event ID" type="string">
  The ID of the event.
</ResponseField>

<ResponseField name="Event Timestamp" type="string">
  The date and time of the event, in ISO 8601 format.
</ResponseField>

<ResponseField name="Event Type" type="string">
  The type of the event.
</ResponseField>

<ResponseField name="Envelope ID" type="string">
  The ID of the envelope this event refers to.
</ResponseField>