falsify
verb [ T ]
uk/ˈfɔːlsɪfaɪ/ usto change documents, figures, records, etc. in order to deceive someone:
She was charged with falsifying bank records.
The certificate had clearly been falsified.
falsification
noun [ U ] uk/ˌfɒlsɪfɪˈkeɪʃən/ us/ˌfɑːl-/
the act of changing documents, figures, records, etc. in order to deceive someone:
Five people were fired for inappropriate behavior and falsification of records.