Each treasurer shall, every May, furnish to the escheator of his county or city a list of all lands within his district owned by any person who has died in possession of an estate of inheritance (i) intestate and without any known heir or (ii) testate without disposing of all property by will and without leaving any surviving heir to inherit the property. No land shall be liable to escheat that has been held for 15 years under adverse possession as at common law by the person claiming such land, or those under whom he holds, but only if taxes were paid throughout that period by the claimant or those under whom he holds.
Va. Code § 55.1-2404