As a consequence of the transposition of european Directives regarding the merger, division, and cross-border mergers, the Romanian legal system established a special legal framework with regard to the sanction of nullity for such juridical acts. The peculiarities of internal and cross-border reorganisation operations, and the imperative of protecting the interests of third parties, associates, and the companies involved led to the creation of a derogatory legal system on the matter. An analysis of both theoretical and practical perspectives of the subject matter may result in a useful instrument for the application of incidental legal norms, or every time restructuring juridical acts contravene the legal norms.