Step by step
- 01
A scanned signature records appearance
It captures how ink looks on paper. The image can be placed on many documents, which makes it convenient but also easy to copy if the file is exposed.
- 02
A digital signature records a cryptographic result
A digital-signature system uses a private key to sign data and a corresponding public key to verify it. Properly implemented systems can help detect document changes.
- 03
The visible mark is not the deciding factor
A digitally signed PDF may show a handwritten-looking mark, a typed name, or no decorative signature at all. The verification data is separate from the appearance.
- 04
Choose from the recipient's requirement
If a form asks for a certificate, verified identity, qualified signature, or digital ID, a signature image is not a substitute. If it accepts an image-based electronic signature, a clean scan may be enough.
A quick requirement check
- Look for words such as certificate, digital ID, qualified signature, or verified signer.
- Ask before submitting when the instructions are unclear.
- Do not describe an ordinary signature image as certificate-backed.
Questions
Can I convert a scanned signature into a digital signature?
Not by converting the image. A digital signature needs a cryptographic signing process and its supporting identity or certificate system.
Can a digital signature display my handwriting?
It can display an image, but that image is only the visible appearance; the cryptographic verification data is what makes it a digital signature.
Which one should I use?
Use the method requested by the recipient or document owner. Requirements vary by workflow and jurisdiction.