Advancement in the medicolegal requirement for testamentary capacity assessment in older adults: the dilemmas in Hong Kong.

Medical and legal professionals are increasingly involved in probate disputes in which the validity of a will due to a lack of testamentary capacity in older adults is frequently challenged. The legal test for testamentary capacity under common-law jurisdiction was established in the famous case of (1870). The High Court of Hong Kong recently issued new practice guidance for legal professionals on the preparation of a will for older adults.