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

# Request expiration

There are situations where you might need to [set an expiration date][exp-date]
for the signature request.

For example, imagine a quote for a service that is valid for 30 days. This
proposal has to be signed by a certain date, and if not, the signature request
for the quote is no longer valid.

All you need to do is pass the `days_valid` parameter.

For example:

<CodeGroup>
  ```sh cURL theme={null}
  curl --location 'https://api.box.com/2.0/sign_requests' \
      --header 'Content-Type: application/json' \
      --header 'Authorization: Bearer ej...3t' \
      --data-raw '{
        "days_valid": 30,
        "parent_folder": {
          "id": "234102987614",
          "type": "folder"
        },
        "source_files": [
          {
            "id": "1358047520478",
            "type": "file"
          }
        ],
        "signers": [
          {
            "email": "signer@example.com",
            "role": "signer"
          }
        ]
      }'
  ```

  ```python Python Gen SDK theme={null}
  def sign_doc_single_more_options(
      ...

      days_valid: int = None,
  ) -> SignRequest:
      ...

      # sign document
      sign_request = client.sign_requests.create_sign_request(
          ...

          days_valid=days_valid,
      )

      return sign_request
  ```
</CodeGroup>

[exp-date]: https://support.box.com/hc/en-us/articles/4404105810195-Sending-a-document-for-signature#:~:text=Step%205%3A%20Setting%20an%20expiration