What is the relationship between ballot reforms and electoral malpractice? This article contributes to the growing comparative politics literature on the causes of election fraud in democratizing countries using the case of the 19th-century United States. We examine the adoption of the Australian ballot and disenfranchisement laws, and estimate their effects on multiple types of election fraud. Using a new measure of fraud in elections to the House of Representatives from 1860 to 1930, we find that the Australian ballot and disenfranchisement measures reduced vote-buying and voter intimidation. However, we further find that the Australian ballot had an "iatrogenic effect" of increasing registration and ballot fraud. Voting secrecy therefore led to substitution of one illicit electoral tactic for another.