The paper presents the main strategies to evaluate the contents of information sources. It uses the notions of information literacy (American Library Information and Dudziak), information sources (Cunha and Tomaél) and disinformation (Fallis and Volkoff) to develop the theoretical framework. It indicates the exploratory methodology based on a literature review in order to explicit the problem presented in the field of information studies. It presents, as results, the indication of three criteria for the evaluation of information sources to avoid sharing and using disinformation (and their negative impacts) in the information practice. Finally, it shows that the need for evaluation is essential to solidarity in the production and to the critical and ethical use of information.