How to Replace a Signature After Signing an Adobe Sign PDF
Question details
The user wants to know if they can replace an applied signature on an Adobe Sign document and how to prevent a black rectangle from appearing around the signature when the document is printed.

- Product
- Adobe Sign
- Device & OS
- not provided
- Scenario
- Printing a completed signed document and attempting to modify a signature post-signing.
- Observed behavior
- The printed document displays a black rectangle around the signature, and the user is unable to easily edit or replace the signature on the finalized document.
Verify whether the document has been fully certified and locked by the signature workflow, as certified digital signatures restrict further editing to protect document integrity.
Update Your Saved Signature with a Transparent Image
Since locked digital signatures cannot be directly replaced without invalidating the document, you must update your signature settings with a transparent image and sign a new copy.
Once a document is fully signed using a digital workflow like Adobe Sign, it is cryptographically locked to prevent tampering. You cannot directly replace a signature on the finalized document. To fix the black rectangle issue for your workflow, you must update your default signature image to one with a transparent background and request a new signature.
Log in to your Adobe account or Adobe Sign dashboard and navigate to your Account Settings or Profile preferences.
Locate the 'Signature' section and delete the existing signature image that causes the black rectangle printing issue.
Upload a new signature image saved in PNG format with a transparent background. This prevents printers from interpreting the background as a solid black block.
Apply your newly updated transparent signature to a fresh, unsigned version of the PDF document.

Sign PDFs Effortlessly with WPS Office
Avoid printing glitches and easily manage your digital signatures using WPS Office. You can add transparent signatures, sign documents securely, and edit PDFs without hassle.
- 1. Open your PDF: Launch WPS Office and open the PDF document you need to sign.
- 2. Access the Sign tool: Go to the 'Insert' or 'Protect' tab on the top ribbon and click on the 'Sign' button.
- 3. Create a signature: Choose 'Create Signature'. You can draw, type, or upload an image file (preferably a PNG with a transparent background).
- 4. Apply and save: Place the signature anywhere on the document, adjust the size, and save your finalized PDF.

Frequently Asked Questions
Why does my signature have a black box when printed?
This usually happens if the uploaded signature image is a JPEG or lacks transparency. Certain printers interpret the non-transparent white background of an image as a solid black block. Using a transparent PNG resolves this.
Can I remove my signature from a PDF after saving?
If the PDF was simply saved locally without digital certification, you can often select and delete the signature block using PDF editing software. However, if it was signed via a certified digital workflow, the document is locked and the signature cannot be removed.
How do I make my signature background transparent?
You can use basic image editing software or free online background remover tools to erase the white background of your scanned signature. Ensure you save the final file as a PNG before uploading it to your signing software.




