@rmhapp You could do this...here would be the setup. Lets say you have 20 Participants you would create a Template with 20 Pages, each page would be the exact same document, so you add the same doc 20 times. On page1 you add Recipient 1’s fields, page 2 has Recipient 2 fields, Page 3 is for Recipient 3 fields and so on. So you are tagging each page with the same fields but for a different Recipient. This still means, unless you use Document Visibility that Recipient 20 could see Recipient 1 through 19s document because it just one big envelope.
I suggest 1 document inside the Template with it tagged for a single Recipient. You then set the CSV to send 20 envelopes, which means 20 rows after the header so that each Recipient gets their own envelope.