From the Proceedings of the National Academy of Sciences, Valerie Ross of Disciver Magazine notes that if you want people to be honest, its far better to have people sign the top of the form than the bottom.  Apparently, taking responsibility from the outset for what you are supposed to report is a more reliable guarantor of honesty.  Perhaps that is why Kol Nidre expresses the thought that Jews take seriously what we might say from this New Year to the next.