Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The IWA Undisputed World Heavyweight Championship is a professional wrestling world heavyweight championship contested for in the Puerto Rican professional wrestling promotion, the International Wrestling Association. The championship was established in 2000, as the IWA World Heavyweight Championship. On December 15, 2007, Scott Hall failed to attend a titular defense which led to the local box and wrestling commission's decision to vacate the WWC Universal Heavyweight Championship and award it to the number one contender who at the moment was Biggie Size.