In the province of Friesland, a proclamatieboek is a register in which the court records the proclamations of real estate sales that took place. This allowed people who had Naastingsrecht the opportunity to match the purchase price and buy the property for themselves.
Proclamatieboeken can be found in the archives of the local courts, which are kept at the provincial archives of Friesland, Tresoar. The Friends of the Frisian Archives (Stichting FAF) have created indexes and abstracts of some of these books, which are available in the Tresoar reading room and other major libraries in the Netherlands.