How to Fix Missing Digital ID Signatures After a PDF Is Returned
Question details
The user needs to understand why a digital signature disappears or fails to print after the document is shared, edited, or signed by another person, and how to resolve this issue.
- Product
- PDF Editors
- Device & OS
- not provided
- Scenario
- Multiple people need to sign or fill out a single PDF document.
- Observed behavior
- The original digital ID signature disappears from the document or fails to appear in print after another user applies Fill & Sign or edits the PDF.
Ensure you have a backup of the original unsigned PDF, and check if the document restricts editing or has been locked by the first digital signature.
Use the Request for Signature Workflow for Multiple Signers
Applying a standard digital signature locks the document. To collect multiple signatures without invalidating previous ones, use a dedicated signature request workflow.
Once a standard digital signature is applied and completed, the PDF is often locked to prevent further changes and protect document integrity. If another user attempts to use standard 'Fill & Sign' tools on a locked document, it can invalidate or hide the original signature. A dedicated signature routing workflow is required for multiple signers.
Open the original, completely unsigned version of the PDF document in your PDF editor.
Navigate to the 'Fill & Sign' or 'Protect' tool menu located in the top toolbar or side panel.
Choose the 'Request for Signature' or 'Send for Signature' option instead of adding a local digital ID.
Add the email addresses of all required signers in the correct routing order and send the document to collect signatures sequentially.
Change Print Settings to Include Document and Markups
If the signature is visible on the screen but missing when printed, the print settings may be configured to exclude form fields and markups.
Sign PDFs Securely with WPS Office
WPS Office provides robust PDF tools, allowing you to easily add digital signatures, request multiple signers, and manage document permissions without signature loss.
- 1. Open your PDF: Launch WPS Office and open your target PDF document.
- 2. Navigate to Protect: Click on the 'Protect' tab located on the top ribbon.
- 3. Apply Signature: Click 'Sign Document' to create or apply your visual or digital signature.
- 4. Share for Multiple Signers: To collect multiple signatures, use the built-in PDF sharing and collaboration tools to send the document to other parties securely.
Frequently Asked Questions
Why does my PDF say the signature is invalid after someone else edits it?
When a digital signature is applied, it certifies the document's state at that exact moment. Any subsequent edits, formatting changes, or form fills alter the document's underlying code, causing the signature validation to fail or disappear in order to protect the original content's integrity.
Can a locked PDF be unlocked to add another signature?
No, once a document is locked by a digital signature, it cannot be unlocked to add standard edits or local signatures. You must start over with an unsigned copy of the document and use a routing workflow specifically designed for multiple signers.
Why is the digital signature visible on my screen but not on my printed copy?
This happens when your print settings are configured to print only the core document content, ignoring annotations, stamps, and form fields. Selecting 'Document and Markups' in the print dialog ensures these overlay elements are sent to the printer.
What is the difference between 'Fill & Sign' and a Digital ID?
Fill & Sign typically applies a visual representation of a signature (like a stamp, typed text, or drawn image), while a Digital ID uses a cryptographic certificate to verify the signer's identity and physically locks the document against tampering.
