jats:titleAbstract</jats:title>jats:pMortuaries were death duties owed to parish priests. The early sixteenth century was a pivotal moment in their long history. In 1529, an act of parliament significantly altered these dues. This article explores mortuary practices in the preceding decades. It examines what mortuaries were, who gave them, and what purpose they served. The importance of local custom is emphasised. The article reconsiders the modern view that mortuary dues were generally disliked. A more complex attitude explains both why mortuaries were reformed and why they would survive for centuries thereafter. Mortuary dues exemplify the symbiotic relationship between law and custom.</jats:p>