> ## Documentation Index
> Fetch the complete documentation index at: https://docs.annature.com.au/llms.txt
> Use this file to discover all available pages before exploring further.

# Void an envelope

Voids a sent envelope, cancelling all outstanding signature requests and preventing the envelope from being completed.

This action is only permitted when the envelope’s status is `sent`.

Once voided, all recipients will be unable to open or complete the envelope. If a recipient attempts to access the envelope after it has been voided, they will see a message indicating it was cancelled by the sender.

## Active sessions and link invalidation

Voiding an envelope immediately **invalidates all access links** — including those sent via email or SMS. This prevents **new sessions** from being created and effectively disables further interaction with the envelope.

However, if a recipient has **already clicked a link and initiated a session**, that session will remain active for up to **60 minutes** from the time it was created. During this window, the recipient may still be viewing the envelope contents.

This behaviour is intentional and mirrors typical session-based security models. It allows Annature to revoke access to sensitive documents for future interactions, but cannot forcefully terminate existing sessions.

> If you accidentally send an envelope containing sensitive information to the wrong recipient, voiding it immediately ensures no one else can open it — but someone who already opened it may retain access for up to 60 minutes.

## Parameters

<ParamField path="id" type="string">
  The unique identifier of the envelope to void.
</ParamField>

<RequestExample>
  ```bash Endpoint theme={null}
  POST /v1/envelopes/:id/void
  ```
</RequestExample>

<ResponseExample>
  ```bash theme={null}
  204
  ```
</ResponseExample>