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The digital signature that certifies your identity, professional status, and organizational affiliation.

The Digital Seal that Keeps your Digital and Paper Documents Secure

CertifiO Code

Trusted timestamp service for time-sensitive documents and emails.

Timestamp

The software that makes digitally signing all your PDF documents easy.

ConsignO Desktop

A digital and trusted electronic signature platform with high-level legal reliability.

ConsignO Cloud

Ensures the reliability of thousands or millions of documents by automating your business processes.

Consigno Server

Easily check signatures, PDF/A compliance, and VDSs (visible digital seals).

Available in mobile, Web or Server version.

verifiO

Help

Find your answer by topic or keyword

Can a digitally signed document be modified?

No. However, you can add annotations (comments) to a digitally signed document. To do so, you need a PDF editor. A signer can always restrict or disallow annotations to their documents.

Nevertheless, if a document is annotated after it has been signed, a warning message will appear to notify you. To accept annotations, you need to sign the document again.

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