I recently watched a documentary on Netflix called (Dis)Honesty – The Truth About Lies. In it, there was an example about how simply reminding the user about attesting to submitting honest information reduced the instances of cheating (they referred to it as demonstrating their "moral fiber").
At the risk of asking too many questions at once, have you found this to be true for forms on web applications? Is there any data behind this? If so, what would be the best copy for this type of question?
I am considering modifying our generic "Submit" button with text to read something like, "This information is true to the best of my knowledge. Please submit it." I've also seen checkboxes with a similar concept.
Edit: We're working on a multi-page form (think of a loan application or rental application). High accuracy/truth is important since we are making decisions relative to other applicants.