falsificador

n. forger, counterfeiter

n. faker, forger; imitator; pirate; counterfeit

= forger, counterfeiter.
Ex: This article details the means available for uncovering forgery attempts by tracing the process a forger might use to introduce spurious correspondence into a presidential archive = Este artículo detalla los medios disponibles para descubrir los intentos de falsificación averiguando el proceso que un falsificador podría usar para introducir correspondencia falsa en un archivo presidencial.
Ex: In the novel the murders have been committed by counterfeiters, not by Lizzie, and Lizzie herself is fictionalized in terms of prevailing Victorian stereotypes of womanhood.