> ## Documentation Index
> Fetch the complete documentation index at: https://developers.luminpdf.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Update Signature Request
> Update the due date of an existing signature request.
This endpoint requires the following scope:
`sign:requests`
## OpenAPI
````yaml PATCH /signature_request/{signature_request_id}
openapi: 3.1.0
info:
version: 1.0.0
title: Lumin API Reference
description: >
The Lumin API Reference provides a comprehensive set of tools to integrate
document workflows — including editing, eSignatures, and automation — into
your applications.
Useful links:
- [Document Repository](https://github.com/luminpdf/luminsign-docs)
- [API
Definition](https://github.com/luminpdf/luminsign-docs/blob/main/openapi.yaml)
- [Authentication Guide](/tabs/guides/authentication/overview)
termsOfService: https://www.luminpdf.com/terms-of-use/
contact:
name: API Support
email: integration@luminpdf.com
url: https://help.luminpdf.com
servers:
- url: https://api.luminpdf.com/v1
description: Production server
security: []
tags:
- name: Signature Requests
description: Everything about Signature Requests
- name: Users
description: Everything about Users
- name: Templates
description: Everything about Templates
- name: Documents
description: Everything about Documents
- name: Workspaces
description: Everything about Workspaces
- name: Agreements
description: Everything about Agreements
paths:
/signature_request/{signature_request_id}:
patch:
tags:
- Signature Requests
summary: Update Signature Request
description: >
Update the due date of an existing signature request.
Update the **due date** (`expires_at`) of an existing signature request
**only when**:
- The request **status** is `NEED_TO_SIGN` or `WAITING_FOR_OTHERS`, and
- The caller is the **creator** of the signature request.
Requests in any **terminal or final status** (e.g., `APPROVED`,
`REJECTED`, `FAILED`, `CANCELLED`, `WAITING_FOR_PROCESSING`) **cannot**
be updated.
parameters:
- in: path
name: signature_request_id
schema:
type: string
required: true
description: ID of the signature request.
requestBody:
content:
application/json:
schema:
$ref: '#/components/schemas/SignatureRequestUpdateRequest'
example:
expires_at: 1927510980000
responses:
'200':
description: Returns the updated signature request.
content:
application/json:
schema:
type: object
properties:
signature_request:
$ref: '#/components/schemas/SignatureRequest'
description: Signature request details with the updated data.
example:
signature_request:
signature_request_id: '1234567890'
title: Title Here
created_at: 1756887739247
expires_at: 1927510980000
status: WAITING_FOR_OTHERS
4XX:
description: Unexpected error
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
security:
- ApiKey: []
- BearerAuth:
- sign:requests
components:
schemas:
SignatureRequestUpdateRequest:
type: object
required:
- expires_at
properties:
expires_at:
type: integer
format: unix-epoch
description: >-
The expiration time of the signature request, expressed as a Unix
epoch timestamp in milliseconds. This value must represent a future
point in time.
SignatureRequest:
type: object
required:
- signature_request_id
- title
- created_at
- expires_at
- details_url
- status
- signers
- signing_type
properties:
signature_request_id:
type: string
description: The unique identifier for the signature request.
title:
type: string
description: The title of the signature request.
created_at:
type: string
description: The time the signature request was created.
updated_at:
type: string
description: The time the signature request was last updated.
expires_at:
type: string
description: The time the signature request will expire.
details_url:
type: string
description: The url to view the signature request in the browser.
status:
type: string
description: The status of the signature request.
enum:
- NEED_TO_SIGN
- WAITING_FOR_OTHERS
- APPROVED
- REJECTED
- WAITING_FOR_PROCESSING
- FAILED
- CANCELLED
reason:
type: string
description: >-
The reason for the status FAILED or REJECTED of the signature
request.
signing_type:
type: string
description: Recipient signing flow.
enum:
- SAME_TIME
- ORDER
signers:
type: array
items:
properties:
email_address:
type: string
description: Email address of the signer.
name:
type: string
description: Name of the signer.
group:
type: number
description: >
The signing order of signer for the signature request with
`signing_type` is `ORDER`. Required if `signing_type` is
`ORDER`.
Only signers in `1st Signers` group will receive
email/notification, signers in subsequent groups will receive
email/notification when all signers in previous group has
signed.
Group starts incrementing at 1.
The default value for group always is 1 if `signing_type` is
`SAME_TIME.`
is_approved:
type: boolean
description: Whether the signer has approved the signature request.
status:
type: string
description: The status of the Signer.
enum:
- NEED_TO_SIGN
- APPROVED
- WAITING_FOR_OTHERS
- REJECTED
- FAILED
- WAITING_FOR_PROCESSING
description: The signers of the signature request.
Error:
type: object
required:
- error_code
- error_message
properties:
error_code:
type: string
description: The system error code.
error_message:
type: string
description: The human-readable error message.
securitySchemes:
ApiKey:
type: apiKey
in: header
name: X-API-Key
description: >
Provide your API key in the `X-API-Key` header, e.g., `X-API-Key:
YOUR_API_KEY`.
BearerAuth:
type: oauth2
flows:
authorizationCode:
authorizationUrl: https://auth.luminpdf.com/oauth2/auth
tokenUrl: https://auth.luminpdf.com/oauth2/token
scopes:
openid: >-
Retrieve basic identity details (username, email, profile
picture).
offline_access: Request a refresh token for long-lived access. Private apps only.
profile.read: View basic user profile information.
workspaces: View and manage Workspaces and Spaces.
workspaces.read: View information about the authenticated user's Workspace.
templates: View and manage templates in a Workspace.
pdf:files: Create, edit, and delete PDF files in a Workspace.
pdf:files.read: Retrieve PDF documents stored in a Workspace.
sign:requests: Create, update, or view signature requests.
sign:requests.read: Retrieve signature requests.
agreements: Create, update, or delete AgreementGen documents.
description: >
OAuth 2.0 authorization code flow. Provide your access token in the
`Authorization` header, e.g., `Authorization: Bearer `. See the
[OAuth 2.0 guide](/tabs/guides/authentication/oauth2) for details.
````