The Hague Conference on Private International Law (HCCH) is the oldest active international organization with legal capacity in the progressive unification of Private International Law (PIL). The HCCH aims to progressively unify PIL to address legal problems in the form of universal regulations. Thailand is aware of the significance and importance of co-operation in PIL, as shown by the accession of Thailand to the HCCH in 2021. This article will examine Thailand’s situation with a technique employed by Charles Dickens in his heartwarming story, ‘A Christmas Carol,’ which examined one character’s experience with reference to events in the past, the present, and the future. The past will be examined through the genealogy of PIL and the experience of Thailand before joining the HCCH. The present will address the status of Thailand in the HCCH. The future will be discussed as suggestions for Thailand after becoming a Member of the HCCH.