This short tutorial describes how to delete signature from PDF using C# REST API. You will learn to upload the target PDF file to a Cloud storage and remove digital signature from PDF using C# .NET-based API. A .NET-based Cloud SDK will be used for this purpose by sending request to the Cloud API using different methods.

Prerequisite

• Create an account API credentials to delete a signature in a PDF
• Download Aspose.PDF Cloud SDK for Dotnet for PDF digital signature removal
• Setup C# project with the above SDK

Steps to Delete a Signature from PDF using C# RESTful Service

1. Create an instance of PdfApi using your Client Secret and Client ID
2. Define the name of the PDF and open it from the local file system
3. Upload the local PDF file to Aspose Cloud using the UploadFile method
4. Check if the signature field is valid and present in the uploaded PDF
5. If the signature is valid, delete the Signature field using DeleteField
6. After deletion, download the modified PDF and save it locally

These steps define the process of how to remove signature from PDF using C# REST Interface. First, the code uploads a local PDF to Aspose Cloud, checks if a specific digital signature exists, and removes it if found. Then, it downloads the updated PDF with the signature field removed and saves it locally.

Code to Delete Digital Signature from PDF using C# .NET-based API

This code demonstrates how to remove digital signature from PDF using C# RESTful Service. You may omit the verification steps if the signature field is already known. After removing the signature, you can perform other operations on the resultant PDF before downloading it to the local disk.

This article has taught the process to delete a signature from a PDF. To sign a PDF file, refer to the article Sign PDF using C# REST API.