This basic guide focuses on how to add digital signature to PDF in Python. The digital signing feature is an effective utility to verify PDF contents as well as to avoid any undesired modifications. These precise steps and the code sample explain how using Python add signature to PDF file.

Steps to Add Digital Signature to PDF in Python

1. Establish the environment to use Aspose.PDF for Python via .NET to add a digital signature in a PDF file
2. Load the input PDF document and the certificate file using PKCS7 class instance
3. Create a rectangle by using the rectangular coordinates on the page and the appearance image to set the signature
4. Certify the loaded PDF file and complete the document signing process
5. Save the digitally signed PDF file on the disk

These steps exhibit how using Python add signature to PDF file is easily possible. You can further customize the appearance of the image by inserting a handwritten signature image while loading the input image. You will require to produce a certificate file along with its password to certify the authenticity of the digital signatures.

Code to Add Digital Signature to PDF in Python

The above example demonstrates how using Python digitally sign PDF feature can be easily integrated into your target applications. PdfFileSignature class instance is used to work with different properties of digital signatures, including revisions or user rights information, and access permissions in order to add or remove the digital signatures from a PDF file to name a few.

In this example, we have learned how to add digital signature to PDF in Python. If you are interested to learn about cropping the content inside the PDF file, refer to the article on how to crop a PDF using Python.