The video below will give you an idea of how Digital Signatures work.
Digital signatures works where you send emails to your clients and you require them to acknowledge the email by digitally signing the attachment to the email and once this is done the attachment will be returned to the Sky system automatically.
Sky software also has a Document Storage Enquiry which will allow you to view all the documents that you have sent out. The document storage enquiry will also allow you to track and control the status of all your documents and will also include the status of digital signatures.