подделывать bedeutet auf Englisch

tamper [tampered, tampering, tampers]▼(alter by making unauthorized changes)
verb
[UK: ˈtæm.pə(r)] [US: ˈtæm.pər]

counterfeit [counterfeited, counterfeiting, counterfeits]▼(To produce something that appears to be official or valid)
verb
[UK: ˈkaʊn.tə.fɪt] [US: ˈkaʊn.tər.ˌfɪt]

doctor [doctored, doctoring, doctors]▼(alter or make obscure, in order to deceive)
verb
[UK: ˈdɒk.tə(r)] [US: ˈdɑːk.tər]

fake [faked, faking, fakes]▼(modify fraudulently to make sth. look better)
verb
[UK: feɪk] [US: ˈfeɪk]

falsify [falsified, falsifying, falsifies]▼(to alter so as to be false)
verb
[UK: ˈfɔːl.sɪ.faɪ] [US: ˈfɒl.sə.ˌfaɪ]

feign [feigned, feigning, feigns]▼(to make a false show)
verb
[UK: feɪn] [US: ˈfeɪn]

forge [forged, forging, forges]▼(to create a forgery of)
verb
[UK: fɔːdʒ] [US: ˈfɔːrdʒ]