"In a lucha de apuesta (betting match), wrestlers make a public bet on the outcome of the match. The most common forms are the mask-against-mask, hair-against-hair, or mask-against-hair matches. A wrestler who loses his or her mask has to remove the mask after the match. A wrestler who loses their hair is shaved immediately afterward." If the true identity of a person losing his mask is previously unknown, it is customary for that person to reveal his real name, hometown and years as a professional upon unmasking.