Yes, to send documents to customers/external users the module need to be activated by Antenor support for 3 party module, after that has been done you can do as following:
1. Start a new i.e customer satisfaction or Supplier Evaluation document from dashboard menu, New Document
2. Fill inn predefined fields if you want or let customer fill inn all fields and then
press the green done button
3. Insert the email of the reciever, and a text to be displayed in the email the customer recieve from the system and click on Send button.
4. Now the customer/3 part will get an email from AMS System with your text and a link to the actual document so they can input the values requested by the document and send it back to you for approval.