Fix Signature Field Disappears When Emailing a PDF Form
Question details
The user needs to prevent interactive signature fields from disappearing when emailing a fillable PDF form so the recipient can sign the document.
- Product
- PDF Editors
- Device & OS
- not provided
- Scenario
- Emailing a fillable PDF document for a recipient to review and sign.
- Observed behavior
- The signature field vanishes when the recipient opens or saves the emailed PDF, preventing them from completing the signing process.
Verify that your original PDF document still contains the active signature field before attaching it, and check which software the recipient is using to open the file.
Instruct the Recipient to Use a Compatible PDF Reader
Default document viewers often flatten or strip interactive fields. Asking the recipient to use proper PDF software ensures the signature field remains visible.
Many operating systems and email clients use default applications, such as Apple Preview on macOS or built-in web browser viewers, that do not fully support complex interactive PDF form fields. When a recipient opens or saves the PDF in these applications, the signature fields can be removed or corrupted.
Ask the recipient to download the emailed PDF attachment to their computer's local drive rather than clicking to open it directly inside their web browser or email client.
Advise the recipient to install a dedicated PDF application, such as WPS Office or Adobe Acrobat Reader, which properly supports interactive form fields.
Instruct the recipient to right-click the downloaded PDF file, select 'Open with', and choose the newly installed PDF reader to ensure the signature fields remain active.
Use Dedicated E-Signature Request Features
Instead of sending an interactive PDF as a standard email attachment, use built-in request features to manage the signing process securely in a web browser.
Easily Add and Manage PDF Signatures with WPS Office
WPS Office provides a comprehensive PDF toolkit that preserves interactive form fields and allows you to easily add, manage, and share digital signatures without compatibility issues.
- 1. Open the PDF in WPS Office: Launch WPS Office and open your fillable PDF form.
- 2. Access the Fill & Sign tool: Navigate to the 'Protect' or 'Edit' tab on the top ribbon and select the 'PDF Signature' or 'Fill & Sign' option.
- 3. Create your signature: Click 'Create Signature' to draw, type, or upload an image of your signature, then click to place it securely into the designated field.
- 4. Save and share securely: Save the signed PDF document to your local drive and share it directly via email from within the WPS Office application.
Frequently Asked Questions
Why does my PDF form look different when opened in Apple Preview?
Apple Preview is a basic document viewer that does not fully support advanced interactive elements like dynamic form fields, JavaScript, or digital signatures. Opening an interactive PDF in Preview often causes these elements to disappear or flatten into uneditable images.
Can a recipient sign a PDF without installing any extra software?
Yes. If you use a dedicated e-signature service (like the Request Signatures feature), the recipient will receive a secure web link. This allows them to view and sign the document directly in their web browser without needing to install standard PDF software.
How do I flatten a PDF so signatures and fields cannot be changed?
To prevent further editing, you can flatten the PDF. Open the document, select 'Print', and choose 'Print to PDF' as your printer. This merges the signature and form data directly into the document's content as a permanent image.
