Sixteen modes of disguise were identified, and the study sought to determine whether the arrestee intended to disguise and what form of disguise was adopted. It was determined that changes in slope, size, speed, substitution of block printing and cursive writing and vice versa, and alterations to upper and lower extenders of letters were the predominant modes of disguise used by arrested felons. The author suggests document examiners need to know as much as possible about disguised writing to help them solve problems posed by the many forms of disguises chosen by arrestees. 25 references and 1 figure