Norms or rules are provisions that must be obeyed, but sometimes things happen outside these rules. For example, about the age limit in a marriage. With the passing of Law Number 16 of 2019 concerning amendments to Law Number 1 of 1974 concerning Marriage, the age limit for marriage is 19 years. Meanwhile, the fact that occurs in society is the number of cases of underage marriages in the law which are caused by many factors, one of which is matchmaking, pregnancy outside of marriage and so on. This will have an impact, both in terms of education, social, economic, health and also a new tradition that occurs is manipulating data by buying age from village officials so that marriage can be legalized. The factors that are rooted in society certainly require the concern of all parties so that they become solutions to mistakes due to deliberate or public ignorance of these problems.

This research is a descriptive-research with a qualitative approach. The data sources used are primary and secondary sources. Collecting data in this study is by observation, interviews and documentation with the analysis technique using the interactive model of Miles and Huberman. The research stage is carried out, namely the preparation, implementation and reporting stages. The research location was conducted in Lowokjati hamlet, Baturetno village, Singosari district, district. Poor. The results of the research, the factors that motivated the perpetrators to buy and sell age are environmental factors and ignorance of the applicable law.

The results of this study indicate that (1) marriage occurs due to matchmaking factors (2) underage marriage occurs due to pregnancy outside of wedlock in junior high school children (3) underage marriage occurs due to economic factors. The recommendation from the author is the socialization to the public regarding the provisions on the age limit for a person to be considered mature for marriage, so that the community can understand more and can fully comply with the law and do not take illegal actions in legalizing marriage.