Legally, Articles 18 and 20 of Law Number 16 of 2001 concerning Foundations, as amended by Law Number 28 of 2004, explicitly require that any changes to a Foundation's Articles of Association (AD) be decided through a valid Board of Trustees Meeting, with a minimum quorum of 2/3 of the total number of members present. However, in practice, notaries frequently draw up deeds of amendments to a Foundation's AD without meeting the 2/3 quorum requirement, leading to legal uncertainty and internal disputes. Therefore, this article discusses the role of a notary in drafting deeds of amendments to a Foundation's AD and examines the legal consequences of deeds drawn up without a quorum of trustees.