Fix Access Token Invalid or Expired Error When Requesting Signatures
Question details
Users are unable to send PDF documents for electronic signature due to a token expiration or validation error.

- Product
- PDF Application
- Device & OS
- not provided
- Scenario
- Sending or sharing a document for electronic signature through a desktop application or specific workflow.
- Observed behavior
- The application interrupts the process and displays the error message 'Access token provided is invalid or has expired.'
Ensure you have a stable internet connection and manually save any open documents locally to avoid data loss before refreshing your account session.
Refresh Your Session by Signing Out and Back In
The most common cause of an invalid access token is a timed-out session. Refreshing your login credentials forces the software to generate a new, valid token.
Authentication tokens are temporary keys used by cloud services to verify your identity. When an application is left idle or a background synchronization fails, this token expires to protect your security.
Open your PDF application, click on your profile icon or navigate to the 'Help' menu, and select 'Sign Out' to completely terminate your current session.
Close the application completely. Wait a few seconds, then relaunch the program to clear any cached background processes.
Click 'Sign In', enter your updated account credentials, and complete any required two-factor authentication.
Open your document and attempt the 'Request e-signatures' workflow again to verify if the fresh token resolved the issue.

Use the Online Web Portal as an Alternative
If the desktop application is glitching or failing to synchronize tokens, utilizing the browser-based version of the tool acts as an immediate workaround.
Sign and Manage PDFs Without Token Errors Using WPS Office
Avoid frustrating authentication errors and expired tokens by using WPS Office. WPS PDF offers a streamlined, built-in signature tool that lets you create, add, and manage e-signatures seamlessly without relying on complex background synchronizations.
- 1. Open your PDF in WPS Office: Launch WPS Office and open the PDF document that requires a signature.
- 2. Access the signature tool: Navigate to the 'Fill & Sign' or 'Protect' tab located on the top ribbon.
- 3. Create your signature: Click on 'Sign' to type, draw, or upload an image of your signature.
- 4. Apply and save: Place the signature onto the desired location in the document, resize it if necessary, and save the file.

Frequently Asked Questions
What does an expired access token mean?
An expired access token means your secure login session has timed out. Cloud-based applications use these temporary digital keys to verify your identity. For security reasons, they must be refreshed periodically by logging out and signing back in.
Will I lose my document edits if I log out to fix this error?
If you are working on a document stored locally on your hard drive, your saved progress will remain intact. Always ensure you click 'Save' or press Ctrl+S manually before signing out of your account to prevent any loss of recent edits.
Can a weak internet connection cause access token issues?
Yes, an unstable internet connection can disrupt communication between your desktop application and the provider's server. This disruption can prevent the token from validating properly when you initiate a cloud-based action like requesting signatures.
How can I prevent session expiration when sending large batches of documents?
To prevent workflow interruptions, avoid leaving the application idle for long periods. If you plan to send a large batch of documents for signatures, proactively sign out and sign back in right before starting to ensure you have a fresh maximum-duration session.




