While these signatures are not genuine, they are undeniably not forgeries in the legal sense. The Court ruled the black signature is a forgery.Compare slope of signature lines cropped. Methods of forgery include handwriting, printing, engraving, and typewriting. Forensic scientists and scholars can study a painting to determine if it is authentic or a forgery. The victim's body will be covered in fake cuts and blood to make the scene feel like a reallife experience.