This paper by Natalie Taylor and Michael Wenzel reports on an experimental study, conducted in collaboration with the Australian Taxation Office (Tax Office), investigating the effects of different letter styles on the rental income reported and rental deductions claimed by 6803 taxpayers with rental property. It was found that being sent a schedule and having to return it to the Tax Office was paramount in reducing the amount of deductions claimed for rental property compared with a control group, for both those previously touched and previously untouched.