The reorganization of the Personal Data Protection Office (UODO), which took place in December 2019, warrants an assumption that 2020 will see increased activity from the supervisory authority. The UODO’s creation of three new departments indicates that the officers intend to specialize further to boost the efficiency of personal data protection inspections, in particular data breaches. Therefore, it is worth analyzing the definition of a breach, based on the decisions issued by the President of UODO in 2019.