SIgn PDF documents

Define and Use Custom Objects for PDF Metadata Signature

Metadata signature is a convenient way to sign documents using metadata properties. In GroupDocs.Signature for .NET 18.9, we introduced the feature of signing the PDF documents using various metadata properties including: Author CreateDate MetadataDate CreatorTool ModifyDate Producer Entry Keywords Title Subject Description Creator You can set all or some of the above-mentioned properties while signing the documents. Since these are the built-in properties, you can only add/update their value. There could be a situation when the built-in metadata properties may not fulfill your requirements and you may want to use your own set of properties to add metadata signatures.