Noting up involves examining how a case has been treated in subsequent cases to determine if it is still authoritative or “good law”. This means checking if the relevant case has been reversed on appeal or overruled by a superior court in a later case.
You may also want to find other cases that have applied the law based on similar facts or later cases that have considered the case and may assist in terms of aiding judicial interpretation of the law.
In order to verify that a case is still considered good law, you have to refer to how the case is treated in the judgment. Usually certain expressions are used to annotate the status of the case within the judgment. Those with similar annotations will usually be grouped together.
Expressions for case annotations may differ from country to country. For Singapore, cases are annotated in the following way: