Ademption by satisfaction describes the situation where a lifetime gift from a testator to a beneficiary is treated as satisfying, in whole or in part, a gift that the beneficiary would otherwise have received under the testator’s will. In practice, it commonly arises where a testator advances money, property or another benefit to a child or other intended beneficiary, intending it to count towards, or replace, that person’s testamentary provision.Across England and Wales, Scotland, Northern Ireland and Ireland, the concept is grounded in case law and general succession principles rather than a single statutory definition, and is closely linked to doctrines of “advancement” and “hotchpot”. Key issues are: (i) establishing the testator’s intention that the lifetime gift operate in satisfaction of the testamentary gift; (ii) determining whether the satisfaction is total or partial; and (iii) evidential requirements, including the value and timing of the gift and any written records.For private client and probate practitioners, ademption by satisfaction is significant in estate planning, will drafting and estate administration, to avoid double benefits, resolve disputes between beneficiaries and ensure that the testator’s intended distribution of assets is carried into effect.