Sign Pdf documents with custom digital signature appearance

GroupDocs.Signature contains classes that implements for Pdf document special signature appearances.

Base signature options SignOptions contains property SignOptions.Appearance that could be assigned with the instance of following class

PdfDigitalSignatureAppearance class implements properties to customize digital siganture appearance.

Here are the steps to add digital signature to PDF document and customize signature appearance with GroupDocs.Signature:

Create new instance of Signature class and pass source document path as a constructor parameter.
Compose object of DigitalSignOptions object with all required properties.
Set DigitalSignOptions.Appearance property with instance of PdfDigitalSignatureAppearance class
Call Sign method of Signature class instance and pass created DigitalSignOptions to it.
Analyze SignResult result to check newly created signatures if needed.

Sign Pdf document with customized appearance of digital signature

This example shows how to add electronic Digital signature to Pdf document with customized appearance.

// initialize Signature instance
using (Signature signature = new Signature("sample.pdf"))
{
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        // certificate password
        Password = "1234567890",
        // digital certificate details
        Reason = "Approved",
        Location = "New York",

        // apply custom PDF signature appearance
        Appearance = new PdfDigitalSignatureAppearance()
        {
            // do now show contact details
            ContactInfoLabel = string.Empty,
            // simplify reason label
            ReasonLabel = "?",
            // change location label
            LocationLabel = "From",
            DigitalSignedLabel = "By",
            DateSignedAtLabel = "On",
            // apply custom appearance color
            Background = Color.Red
        },
        AllPages = true,
        Width = 160,
        Height = 80,
        // setup signature border
        Border = new Border()
        {
            Visible = true,
            Color = Color.Red,
            DashStyle = DashStyle.DashDot,
            Weight = 2
        }
    };
    SignResult signResult = signature.Sign("signed.pdf", options);
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple, but powerful free Apps.

You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.

Sign Pdf documents with special appearance Working with signature brush styles