EN
In their article, the authors discuss the findings of the audit on how the obligation to provide for sustainability of projects is fulfilled in three Polish regions: Lubuskie, Małopolskie and Śląskie. The article presents the principles related to project sustainability, set forth in Regulation (EU) No 1083/2006 of the Council, and the most important problems and irregularities in their application. A need has been observed to clarify the requirements in contracts concluded in the new financial perspective (2014−2020), related to archiving and marking documents, rooms and devices, and, in the first place, to clear defining of indicators for project impact, implementation of tasks and maintaining sustainability of effects.