This paper analyses, from a sample of 860 undergraduates in Nicaragua and El Salvador, how willing they would be to donate money to ONGs if they lived in an industrialised country, as well as their perceptions of the work undertaken by these organisations, the trust they generate, their perception of the effect their work has and how sustainable they think the projects they undertake are, and how they perceive wrongdoing by their members. Are also analysed how differences in socio-demographic variables, the university at which they study, their political ideology, economic situation or links to an NGO affect these perceptions. The results show a high degree of willingness to donate money to NGOs if they lived in an industrialised country. With increased willingness being shown by women, the more politicised, those that consider themselves to be poor, and those that work or collaborate with NGOs. Moreover, different degrees of agreement with aspects related to NGOs were found according to the economic situation, the university at which they studied and the gender of those interviewed.