From Longman Business Dictionary
falsifyfal·si·fy /ˈfɔːlsəfaɪˈfɒːl-/ verb (past tensepst and past participlepp falsified) [transitiveT]LAWACCOUNTING to change figures, records etc so that they contain false informationThe financial director was charged with falsifying the company’s accounts.
—falsification noun [countableC, uncountableU]the falsification of expense accounts
a lawsuit alleging weight falsification (=when scales in a shop have been changed, cheating customers)