What Bona Vacantia means: When someone dies without a will or relatives, their property is classed as “ownerless” and passes to the Crown (or a Duchy in Cornwall/Lancaster). Freehold land can also revert to the Crown in certain company or bankruptcy cases.
Claiming unclaimed estates: Heirs have up to 12 years (with interest) or 30 years (without interest) to claim, but strict proof is required – usually a solicitor prepares a full family tree plus official certificates and ID to show entitlement under intestacy rules.
Avoiding Bona Vacantia: The only sure way to stop assets going to the state is to have a valid, regularly updated will and to consider inheritance tax planning with proper advice.