The rights of the patent holder for plant varieties are part of the category of exclusive rights, consisting of intangible assets, based on the ideas born and thought by inventive people - breeders, who create, discover and develop new plant varieties. The patent confers on the breeder the right to prohibit (prevent) third parties from producing, using or marketing without his authorization the patented variety as well as the harvested material of the protected variety, with some exceptions expr essly stipulated by law. In the Republic of Moldova, the rights of the protection holder derive from the provisions of art. 15 of Law no. 39 of 29.02.2008 on the protection of plant varieties, which establishes imperative civil law norms, in the sense that shall refrain from the unauthorized use of a patented plant variety. Patent rights for plant varieties become enforceable against third parties at the time of registration and publication, but this cannot be tantamount to proper notification by third parties to refrain from using the protected plant variety. Thus, the patent holder has the responsibility to properly inform the third party, to supervise, to control through all legal measures and in case of violations, to prohibit the reproduction, multiplication and capitalization of the protected variety and to oblige the guilty third party to repair the damage suffered.