A notary who has been given the task and authority to issue a notary deed must comply with applicable legal provisions. Notaries as public officials are authorized to draw up deeds regarding all actions, agreements, and stipulations based on statutory regulations. The formulation of the problem in this study is: what is the responsibility of a notary against falsifying client data in making a deed, and how is the legal protection for a notary in falsifying client data in making a deed. This is a normative legal research that was carried out using an approach through legislation and literature studies. The results of the research and discussion conclude that relating to the making of a Notary Deed requires documents or statements from the client which must be in accordance with their authenticity, there is no element of falsification in making a Notary Deed. If there is an element of forgery and the Notary participates in making the document or statement, the Notary must be responsible for the deed he made. However, before a Notary gets sanctions for unlawful acts, it is necessary to have evidence in advance that there are losses suffered by the parties or clients for the unlawful acts committed by the Notary.