With Law 5303/2026, a radical reform of inheritance law was enacted, which, however, applies to the inheritance relations of persons whose death occurs on 16.9.2026 or later. The extensive reform represents the most profound change in the history of Greek inheritance law, as well as the largest intervention to date in the Civil Code. This collective work, authored by members of the Legislative Drafting Committee, aims to provide a systematic legal analysis of the entire reform, continuously comparing it with the previous law to better illuminate the content of the new provisions. It seeks both to interpretively present the new regulations and to highlight their practical consequences, sometimes with the aid of examples. Additionally, proposed regulations that were ultimately not adopted by the Legislative Drafting Committee are presented, along with critical comments from the authors-members of the Committee on specific provisions.

There are four main pillars around which the reform is structured:

i. the generally limited liability of the heir with respect to their individual estate for the debts of the inheritance

ii. the abolition of the prohibition of inheritance agreements

iii. the adaptation of intestate inheritance to modern family structures

iv. the rationalization of the institution of legitimate shares by transforming it from a real estate inheritance portion into a contractual-monetary claim.

Furthermore, as part of the inheritance law reform, institutions that had fallen into disuse (such as sale of the inheritance, usufruct of the ascendant, acceptance with the benefit of inventory) are abolished. The provisions amended by Law 5303/2026 outside of inheritance law and the Civil Code, as well as transitional provisions, are also analyzed. Finally, a detailed comparative overview table of the old and new law provisions is provided.

This work aims to provide the legal community with a reliable scientific guide to the new legal landscape created by Law 5303/2026 in the field of inheritance law. The systematic approach to the new provisions in relation to the previously applicable regulations is expected to be particularly useful for scholars and practitioners of law, lawyers, and notaries dealing with inheritance law, as the old provisions of inheritance law will continue to apply for a significant period after the adoption of the new regulations, running in parallel with the new ones.