Use RSign interface or iFrame RSign web application into sender application
Create a web form template (with fields, with or without eSignature)
Upload PDF or DOC form into web user interface
Drag and drop fillable form fields
Optionally add electronic signature fields
Optionally map desired form fields in the template to sender application fields
Configure REST APIs or use a pre-configured CRM application like the RMail and RSign Salesforce.com app
Map the static link to an email template or website button