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Apply trusted digital signatures
Add certificate-based digital signatures to PDF documents and verify signer identity. Use when documents require authenticated signing and protection from unauthorized changes.
Validate existing signatures
Validate signed PDF documents to identify trusted, expired, revoked, or tampered signatures. Use when signature verification is required before approval, compliance, or archival.
Multi-signature approval workflows
Allow multiple stakeholders to sign the same PDF document while preserving existing signatures. Use when approval workflows require sequential approvals and signature tracking.
Frequently Asked Questions
Can Document SDK digitally sign PDF without Adobe dependencies?
Yes. The Document SDK performs digital signing and validation directly within your application without requiring Adobe Acrobat or other desktop tools. All processing runs in managed .NET code.
Does Document SDK support digital signature in Docker and cloud environments?
Yes. The Document SDK supports digital signing and validation on Windows, Linux, Docker, Azure, AWS, Google Cloud, and other modern .NET deployment environments.
Does Document SDK support long-term PDF signature trust?
Yes. The Document SDK supports long-term trust workflows that preserve evidence alongside the signature, helping archived documents remain verifiable for audit and compliance purposes.
Does Document SDK support multi-signature workflows?
Yes. Multiple stakeholders can sign the same PDF document while preserving previously applied signatures. Each signature remains independently verifiable throughout the approval process.
Do digital signatures in Document SDK support external signing providers?
Yes. The Document SDK supports external signing workflows that integrate with HSMs, smart cards, USB tokens, and cloud-based signing services.
Is a separate license required for Document SDK digital signatures?
No. Digital signature capabilities are included as part of the Document SDK licensing model, allowing teams to integrate signing and validation workflows without requiring a separate license.
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