How to Prevent Users from Adding Digital Signatures to a PDF
Question details
The user wants to restrict the ability to add digital signatures to a PDF document while keeping standard form fields fillable.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Distributing a fillable PDF form where users should enter data but are prohibited from signing the document digitally.
- Observed behavior
- Users are able to use the PDF reader's signature tools to add signatures despite restrictions intended only for form filling.
Ensure you have the owner or master password for the PDF document, as modifying security and permission settings requires full administrative access to the file.
Adjust PDF Permissions to Disallow Commenting and Restrict Editing
Changing the document's security settings to allow only form filling while disabling commenting prevents the placement of digital signatures.
In many PDF applications, signature tools are tied to commenting and annotation permissions. By explicitly disallowing commenting and restricting changes strictly to form filling, you can block the signature placement tools.
Open your PDF document in your PDF editor. Navigate to the tools menu, find the 'Protect' or 'Security' section, and select 'Advanced Options' followed by 'Security Properties'.
Change the Security Method to 'Password Security'. A dialog box will appear to set your password and restrictions.
Check the box next to 'Restrict editing and printing of the document'. This will allow you to configure specific permissions.
In the 'Changes Allowed' dropdown menu, select 'Filling in form fields and signing existing signature fields'. Make sure you have not placed any actual signature fields in the form design.
Ensure that any options related to 'Commenting' are unchecked or disabled. Disallowing commenting is crucial to preventing the use of signature tools.
Enter a strong permissions password, click 'OK' to apply the settings, and save the document. Test the PDF to ensure the signature tool is grayed out.
Easily Manage PDF Permissions and Security in WPS PDF
WPS PDF provides a straightforward way to protect your documents, restrict editing, and manage who can add signatures or comments, all within a user-friendly interface.
- 1. Open PDF in WPS: Launch WPS Office and open your PDF document in the WPS PDF editor.
- 2. Access Protection Tools: Navigate to the 'Protect' tab located on the top ribbon and select 'Encrypt'.
- 3. Enable Restrictions: Check the box to 'Set Password for Editing and Extracting' to activate permission settings.
- 4. Configure Permissions: Adjust the permissions in the dropdown menus to allow form filling while prohibiting comments and unauthorized modifications.
- 5. Save the Secure PDF: Enter your owner password, click 'Confirm', and save the document to apply the security restrictions.
Frequently Asked Questions
Why can users still add signatures when editing is restricted?
Some PDF readers allow adding signatures through commenting or annotation tools. If commenting is allowed in your security settings, users might bypass the editing restrictions to place a signature. Disallowing commenting usually fixes this issue.
Can I remove a digital signature that a user has already added?
Only the person who placed the digital signature can clear it using their specific digital ID. As the document owner, your best option is to revert to a previous version of the PDF saved before the signature was applied.
Does removing signature permissions affect fillable form fields?
No. You can set the document permissions specifically to 'Filling in form fields' while disabling other features like commenting and general editing. This allows users to type in text boxes without being able to modify the layout or add digital signatures.
Is a printed digital signature legally binding?
A printed version of a digital signature loses its cryptographic validity. Digital signatures rely on electronic certificates embedded in the PDF file, making them verifiable only in their original electronic format.
