This article investigates the limitation of freedom of testation in terms of the boni mores or public policy from a legal-comparative perspective. The limits imposed by public policy on freedom of testamentary disposition in English and Australian law are analysed, and the limitation of freedom of testation in terms of the good morals in Dutch and German law is investigated. It is proposed that the operation of the boni mores or public policy in these jurisdictions holds valuable lessons for future development in South African law.