Requirements risks are inherent in the requirements elicited from the stakeholders. It is important to access and mitigate the requirement risk as early as possible to avoid a poor quality of requirements engineering. The poor quality of requirements has a direct effect on the quality of software development. Hence, our paper aims to investigate on the approaches to identify requirement risks.There are a few available papers found on the topic of requirements risk in our literature review. We discussed on the results in the discussion section. In conclusion, we found that most of the researches prefer interview session, questionnaire and survey in identifying requirement risk.