How to Fix Acrobat Reader The Signature Was Unsuccessful Error
Question details
The user encounters an immediate error message when attempting to add a digital signature box to a PDF document.
- Product
- Adobe Acrobat Reader DC
- Device & OS
- not provided
- Scenario
- Initiating the digital signature tool to draw a signature field on a PDF file.
- Observed behavior
- Acrobat Reader displays a 'The signature was unsuccessful' error as soon as the user starts drawing the signature field. Reinstalling the software only provides a temporary fix before the issue recurs.
Ensure that the PDF document's security settings actually permit signing by checking File Properties, and verify that your operating system has no pending restart requirements.
Repair Installation and Update Acrobat Reader
A corrupted installation or an outdated software version is a common cause of signature drawing failures. Repairing the installation ensures all background components are functioning correctly.
Since simply reinstalling the application only provided a temporary fix, using the built-in repair tool followed by a manual update check can resolve deeper registry or component errors that a standard uninstallation leaves behind.
Open Adobe Acrobat Reader DC, click on the 'Help' menu at the top, and select 'Repair Installation'. Allow the process to run completely.
Once the repair is finished, restart your computer to ensure all background services are properly reset.
Relaunch Acrobat Reader, go to 'Help' > 'Check for Updates', and install any available patches to fix known signature bugs.
Reset Acrobat Preferences
Corrupted preference files can cause recurring software glitches. Resetting them forces the program to generate fresh, error-free settings.
Use WPS PDF to Add Digital Signatures Without Errors
If your current PDF reader continues to glitch when applying signatures, WPS PDF offers a stable, lightweight, and highly reliable alternative for viewing, editing, and securely signing your documents.
- 1. Open the Document: Launch WPS Office and open your PDF file using the WPS PDF tool.
- 2. Access the Signature Tool: Navigate to the 'Fill & Sign' or 'Protect' tab located on the top navigation ribbon.
- 3. Create Your Signature: Click on 'Sign' and choose 'Create Signature' to draw, type, or import an image of your signature.
- 4. Apply and Save: Click anywhere on the document to place the signature box, adjust the size, and save the file to finalize your signature.
Frequently Asked Questions
Why does my digital signature fail before I even draw the box?
This usually occurs due to corrupted application preferences, conflicts with cached signature data, or an outdated software version that fails to initialize the signature module properly.
Will reinstalling Acrobat Reader permanently fix signature errors?
Not always. A standard uninstallation often leaves behind corrupted registry keys or hidden preference files. If the error returns, you may need to use a dedicated cleanup tool before performing a fresh installation.
How can I check if a PDF document allows digital signatures?
Open the PDF, navigate to 'File' > 'Properties', and click on the 'Security' tab. Review the 'Document Restrictions Summary' to verify if the 'Signing' status is set to 'Allowed'.
