This document discusses testamentary capacity, which refers to a person's mental competence to make a will. It defines testamentary capacity and outlines the important elements one must possess, such as understanding the act of will-making, knowing the nature and extent of one's assets, and being free from delusions. Factors that can affect capacity, like medical conditions, psychiatric disorders, and undue influence, are described. Methods for assessing capacity, including by using tests like the Mini Mental State Examination and clock drawing test, are provided. The importance of thorough documentation during the assessment process is also emphasized.