A grant deed is an authentic deed made by a Land Deed Making Official as an authorized public official and contains legal actions, namely grants. The grant deed is used for granting immovable objects such as land or buildings on it by a grantor to a grantee. That a grant deed is also a proof of the transfer of land rights which are the object of a grant from a grantor to a grantee. That in this study, the formulation of the problem consists of two, firstly the position of the grant deed in the dispute over land rights ownership and then the position of the grant deed that passes or exceeds the rights of the heirs. The grant deed is only written evidence of the occurrence of a transfer of rights from a grantor to a grantee, so if there is a dispute over the land that is the object of the grant, it will definitely affect the legal force of the grant deed. Then related to the rights of the heirs or legitime portie, it is an absolute right that becomes the right of a legitimary. So regarding a grant that exceeds or passes the legitime portie, a grantee is obliged to compensate the legitimacy until the portion of the legitime portie is fulfilled, or the portion of the grant received will be subject to incorting.