counterfeiting

ˈkaʊntəfɪt
ˈkaʊntəfiːt

verb

imitate fraudulently.

my signature is extremely hard to counterfeit

fake,forge,copy,reproduce,replicate,imitate,simulate,feign,falsify,sham,pirate

SYNONYMS

copyfakefalsifyfeignforgeimitatepiratereplicatereproduceshamsimulate