The Act of Guarantee (Dutch: Akte van Garantie) of the hereditary stadtholderate was a document from 1788, in which the seven provinces of the States General and the representative of Drenthe declared, amongst other things, that the admiralty and captain-generalship were hereditary, and together with the hereditary stadtholderate would henceforth be an integrated part of the constitution of the Dutch Republic. Moreover, members of the House of Orange-Nassau would have the exclusive privilege to hold the office. The Act was in force until the Batavian Republic was established in 1795.