In the 20th century, the imperative of promoting endeavours that cultivate competencies for sustainability became evident. However, fostering these competencies is not enough; there is a need to rigorously evaluate such endeavours’ outcomes and the evolution of the competencies themselves. The aim of this paper is to initiate a discussion on the development of a questionnaire to evaluate the conceptions of participants in initiatives aiming to promote sustainability competencies, regarding their ability to promote those competencies. To this end, this contribution reports the results of a literature review that was conducted in Scopus, Web of Science and Eric to map the research on data collection tools for evaluating these competencies. The systematized review process, integrating a set of the recommendations of the PRISMA 2020 statement, did not yield the anticipated outcome, due to the absence of identified or explicit data collection instruments suitable within this context, as only two documents met the defined inclusion criteria. However, this review did contribute to a more comprehensive understanding of the necessity for standardizing nomenclatures and, concurrently, facilitate the development of a questionnaire that will align with the initial objectives. To this end, the two academic papers that have been identified, which will inspire and inform the subsequent stage of research, where a questionnaire will be developed, either ex novo or based on pre-existing.