The world of business needs a legal assurance in its every activity. That is
the thing sought by the businessmen in Indonesia, whether domestic or foreign
business actors. The legal assurance must be in the case of civil law especially
bankruptcy. To obtain a legal assurance, there are legal problems. The existing legal
problems is how the application of Bankruptcy Law Principles by the judge in the
bankruptcy decision-making and how is its correlation with the Law of Nation
Owned Business (BUMN). The purpose of this research is to know to what extent the
legal assurance is obtained from every bankruptcy decision based on the principles of
bankruptcy laws. Thus, this research uses empirical legal research methodology (law
in action), so the main data are the data from the direct sources. The nature of this
research is analytical description, that is the problem solving studied by describing or
depicting what is stated by the source in written and oral forms and actual behavior
are studied and researched holistically as well as the result of decision of bankruptcy
case in Trade Court. It can be concluded that the application of bankruptcy law
principles in decision making is still frequently not based on the existing principles
of bankruptcy law ruled in the Constitution and pay less attention to other regulations
in other correlating Constitutions. Therefore, it is important to have other strict
provisions, the exact application of legal principles, and strict law enforcement
officers as well, high consistency and credibility with special training in the first
place.