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Digital signatures
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Add Long Term Validation (LTV) data to an existing signature
Create a new digitally signed PDF document
This code sample creates a new PDF document, adds a signature fields, and then digitally signs it. Read or search our code sample base.
Digitally sign a PDF form in C# or VB.NET
This code sample shows you how you can import a digital signature and use it to sign a PDF document in C# or VB.NET.
How to sign and verify updates to a PDF document
This code sample shows how you can sign PDF documents and how to handle updates to form data. Read or search our code sample base.
Create a custom signature handler to sign and verify PDF documents
This code sample shows how to create your own signature handler. Read this code sample or search our code sample base.