In June 2018 Indonesia conducted the general election of the regional head (pilkada) simultaneously. The interesting thing about pilkada this time is the emergence of the phenomenon of a single candidate in some area. One area that has a single candidate in the city of Tangerang. Voter ballots where there is only a single candidate, the partner is an empty box. Not all societies understand what an empty box is, so socialization is needed for the community to understand. The purpose of this research is to know and analyze the effectiveness of socialization about "empty box" conducted by the General Election Commission (KPU) Tangerang City in Tangerang mayoral election in 2018. This research approach is quantitative. The methods that were used is the survey method with descriptive type. The technique of data retrieval is done through questionnaires distributed to the respondents selected by purposive. The subjects of this study are the people of Tangerang City who have the right to vote which is categorized based on age that is 17 years old until 60 years old. Based on the result of the preliminary survey, it is known that the socialization conducted by KPU-Tangerang has not been effective yet, from 100 respondents obtained 50% result know about the existence of ‘kotak kosong' (empty box) while 50% others do not know. Of the respondents who knew about the empty box, 89% were obtained from the Network of Empty Boxes, not from the KPU.