A risk register is a tool used to document and track potential risks associated with a project or organization. It is used to identify, assess, and prioritize risks, and to document the strategies used to manage them. The risk register is an important part of a comprehensive risk management program and can help
From Wikipedia
A risk register is a document used as a risk management tool and to fulfill regulatory compliance, acting as a repository for all risks identified and includes additional information about each risk, e.g., nature of the risk, reference and owner, mitigation measures. It can be displayed as a scatterplot or as a table.