Escheator

Escheat is a common law doctrine that operates to ensure that property is not left in limbo and ownerless. It originally referred to a number of situations where a legal interest in land was destroyed by operation of law, so that the ownership of the land reverted to the immediately superior feudal lord.
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(n.)
An officer whose duty it is to observe what escheats have taken place, and to take charge of them.
  

The shire officer, in England, who was responsible for the administration of land grants and feudal rights relating to land and fiefdom.