I am getting the same "This operation violates your permissions configuration" error. However, I want the entire PDF submitted, not just the data. I did have a few Read Only fields and some locked text (wish I could figure out when my text is locked or not; I can't tell, not really a toggle there, you're just supposed to know if you're locking or unlocking with the "lock" I guess).
Anyway, the collection doesn't matter if I want the entire PDF sent back digitally signed. I used a generic button and made it a submit button and chose PDF instead of XML. I got rid of read only fields, still have the error. Any other ideas?