DOCUMENT CONTROL / SIGNATURES
A visible stamp and a digital signature answer different questions.
A stamp helps a person see the status or purpose of a document. A certificate-backed digital signature helps software verify a signing identity and whether the signed bytes changed.
VISIBLE PDF STAMP
What should a reviewer see?
- Text, image or seal placed on a page.
- Useful for received, paid, draft or approved status.
- Easy to inspect when printing or circulating a PDF.
- Does not prove who placed it or whether the file was altered later.
DIGITAL SIGNATURE
What should software verify?
- Certificate and signer identity chain.
- Cryptographic integrity of the signed file.
- Signing time and certificate status where supported.
- Requires a dedicated signature or certificate workflow.
Which one belongs in your process?
Use Stamp PDF for a visible workflow mark when people need to understand status at a glance. Use a qualified electronic-signature service when your policy or jurisdiction requires signer authentication, tamper evidence or a certificate chain. Some teams use both: a signature for integrity and a visual stamp for routing.
PDF SealBox adds visible marks. It is not a certificate authority, identity-verification service, notarization service or legal advisor.