This thesis aims to understand how the protection of the law enforcement against first to file marks, in relation with the dispute marks “WHITE HORSE” in Indonesia. The methodology used by the writer is normative juridical research methods with statute approach and case approach, along with primary, secondary and tertiary legislations. Data analysis technique used is qualitative analysis. Data collection techniques used writer is a study literature available. In this case, writer used two approach namely statute approach and case approach. This thesis focuses on the case study of WHITE HORSE CERAMIC CO, LTD. TAIWAN (applicant judicial review/defendent judicial review/defendent cassation/plaintiff) against PT. WHITE HORSE CERAMIC INDONESIA (defendent judicial review/applicant judicial review/applicant cassation/defendant), with legal citation “l33/Merek/2012/PN.Niaga Jkt.Pst juncto 890 K/Pdt.Sus/2012 juncto 131 PK/Pdt.Sus-HKI/2014 juncto 123 PK/Pdt.Sus-HKI/2016”. Plaintiff and defendant have the same mark namely WHITE HORSE. But their product is different. Plaintiff producing some ceramics and defendant producing some stones, gravel, and another goods. From a comprehensive research, it shows that the tribunal judge in charge of the decision on the case is deemed wrong and inappropriate due to the nonconformity of the law and legal reasons in the verdict procedure with the factual findings. In fact, marks in Indonesia embraced constitutive system (first to file) namely the right to create a mark because registration by mark’s owner in the office registration, in this case the directorate of property rights. Based on this research, there should be stricter procedures during the mark registration in the directorate of property, because of the existence of faulty registrations which could trigger problems among some of the parties with the same interests.