Background. Analysis of the organization of the third sector requires the introduction of new concepts in order to describe and explain the principles of their functioning. NGOs are forced to pay more and more attention to relations with cooperating entities, the so-called stakeholders. Building trust seems to be the way of facilitating cooperation, achieving set goals and developing the organization. An important feature of the third sector organizations is that they arise as a result of the

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... s a result of the grass-root civic initiative, i.e. people who want to achieve a specific goal. Building optimal, complex interactions with the stakeholders seems to be crucial where achieving the goals of the third sector entities is concerned. This goal can be effectively achieved when cooperation is built on the trust basis. Trust seems to be not only a determinant of shaping the activities of NGOs, but also the effect of their functioning. The article puts forward a thesis that trust is an important factor determining the success of non-profit organizations. Research aims. The aim of the article is to indicate places -relationships and determinants of trust formation, as well systematics of types of trust to non-governmental organizations. The article presents the concept of trust in NGOs taking into account the factors shaping this trust. Methodology. For the analysis of trust in NGOs, the analysis of the literature on the third sector, management and trust was carried out. The review made it possible to refer knowledge to determine the factors that shape trust in NGOs. The literature analysis has been supplemented with a review of research on operating conditions and assessment of the activities of third sector entities in Poland. Key findings. The review of literature made it possible to systematise the concept of trust in the organization of the third sector. The analysis of the concept of trust in NGOs indicated the areas of confidence building and the need for further systematic analysis of trust in entities operating in the third sector.