In today’s digital workspace, electronic document signing has become a standard practice for professionals. It is an important aspect of finalizing contracts, verifying reports, or authenticating forms. The ability to e-sign PDF documents with image signatures helps maintain credibility and prevents unauthorized edits. Automating the signing process saves time and guarantees your documents remain secure and professionally presented.

This article walks you through how to add image signatures in PDF files in C# apps using the .NET REST API. With a few simple steps, you can automate the process and set up a smooth signing workflow that functions effortlessly inside your C# applications.

Steps to Sign PDF With Image Signatures Using C# .NET

1. Install GroupDocs.Signature Cloud SDK for .NET from NuGet
2. Use the Configuration class to set up your client credentials
3. Create an object of the SignApi class
4. Configure the image signature with SignImageOptions
5. Add the source and output file settings using SignSettings
6. Send a PDF e-sign request and process it with CreateSignatures

Developers can follow these straightforward steps to embed image signatures into PDFs programmatically in .NET. You can specify where your signature image appears, adjust its size, and apply it to multiple document pages at once. The process requires less coding effort and no complicated tools. The REST API ensures that every signed PDF retains visual quality while embedding verifiable signature data, making it reliable for professional and legal use. Because the .NET document signing API supports automation, you can replace repetitive manual workflows quickly.

Code to Sign PDF With Image Signatures Using C# .NET

Integrating image signatures into PDF files with the GroupDocs.Signature Cloud .NET SDK is an efficient way to modernize your document workflow. The setup is quick, requires no advanced coding skills, and lets anyone sign PDFs digitally within their C# apps. The .NET REST API helps you scale your digital signing workflow while maintaining a consistent, secure process.

For more signing options, check out our guide on Adding QR Code Signatures to PDFs Using the .NET REST API.