How to add a transparent signature to a PDF

Prepare a clean signature image, add it through Adobe Acrobat’s signing tools, and understand when a visual signature is not enough.

Image signature or digital signature?

A transparent PNG is an image of handwriting. A certificate-based digital signature uses a digital ID and can provide identity information and tamper evidence. Removing an image background does not create a certificate.

1. Create the transparent signature PNG

Use a clear photograph or scan with the signature on light paper. Adjust removal strength until paper and shadows disappear while the pen strokes remain complete.

2. Add the image with Acrobat Fill & Sign

Open the PDF in Acrobat, choose E-Sign → Fill & Sign → Add signature, select the image option, choose your transparent PNG, and place it in the authorized field.

3. Check the PDF before sending it

Resize from a corner, check the visible ink against the form, and save a separate final copy. Follow the recipient’s required signing process when identity verification matters.

Create a transparent signature