This paper reviews 38 studies conducted between 2015 and 2022 on collaborative assessments in open-distance and e-learning (ODeL) contexts, focusing on the benefits, types, challenges, and strategies to improve collaborative assessments. This qualitative review aims to investigate collaborative assessments within the ODeL comprehensively. The objectives encompass thoroughly exploring theoretical foundations and empirical evidence to illuminate the pedagogical implications and effectiveness of collaborative assessment methodologies. Employing a systematic literature review approach, various scholarly articles, research papers, and educational studies were scrutinised to synthesise the current landscape. The review shows that effective communication, feedback, and appropriate technology are critical factors in promoting successful collaborative assessments, which can result in improved engagement, motivation, and better learning outcomes. However, challenges such as scheduling difficulties, technology challenges, group dynamics, and assessment quality may arise. Using social constructivism, this paper addresses criticisms of collaborative assessment in the ODeL context, identifies types of collaborative assessments, and presents strategies for implementation and addressing challenges. Based on these findings, recommendations are presented to educators, urging the integration of collaborative assessment methods into open distance and e-learning frameworks, accompanied by pedagogical support and training to optimise their efficacy and promote enriched learning experiences. The paper concludes by suggesting future research areas and recommendations for educators and instructional designers seeking to implement collaborative assessments in ODeL environments. Collaborative assessments can contribute to collaborative learning, providing students with a sense of community, engagement, and responsibility. [This paper was presented at the International Conference on Educational Technology and Online Learning held on 23-26 June 2022 at Ören, Burhaniye, Turkey.]