Quote Originally Posted by rockmanj View Post
I am pretty sure that there are reports filed for every mission (evidenced by the paperwork that Tsunade complains about). And Kabuto was/is a spy. I am sure he had men on the inside that had access to those reports.
Except I don't believe Zabuza/Haku was ever mentioned in Kakashi's report. If they were, then the report would have been filed as an A or S ranked mission, which the wave country was unable to afford.