fal·si·fy /'fȯl-si-ˌfī/ vt -fied, -fy·ing: to make false: as
a: to make (as a document) false by mutilation, alteration, or addition
the motel clerk had falsified the records — M. A. Kelly
b: to report (as information) falsely
the informant falsified his testimony
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.