This article presents an analysis of the long legal battle (1533–1546–1549) waged by the Pasvalys church parish priest Erazmas, son of Eustachijus (†1545/1546), over the allocation of four vacant plots of land to the Pasvalys church’s jurisdiction. Suspicions over the falsification of documents are proven. Attention is given to the legal culture environment existing in the Grand Duchy of Lithuania and how justice was executed. Both the favourable and unfavourable elements of legal culture are distinguished, which determined.