The article analyzes the concept of quasi-criminal offenses, which was introduced in Ukraine after the adoption of the Law of Ukraine “On Amendments to Certain Legislative Acts of Ukraine in the Field of State Anti-Corruption Policy” in 2014. Although this phenomenon remains outside the attention of the scientific community, it raises many discussions regarding its legal nature. The study proposes a definition of the concept of “quasi-criminal offense” as a violation related to the legal liability of legal entities for the actions of their authorized persons. The author considers the peculiarities of the composition of such offenses, in particular, objective and subjective signs, as well as the motives and goals of such actions. The article presents three main categories of quasi-criminal offenses depending on the type of actions of authorized persons. Particular attention is paid to analyzing how the object and objective side of a quasi-criminal offense are transformed in cases where the crime is committed on behalf of and in the interests of a legal entity. The work aims to contribute to further research in the field of legal entities’ liability for criminal and quasi-criminal offenses.