Sasine (Scots law) is the delivery of feudal property, typically land.
Feudal property means immovable property, and includes everything that naturally goes with the property. For land, that would include such things as buildings, trees, and underground minerals. A superior (eg, a heritor) might authorise his agent or factor to give possession of his property to someone else through a document known as a "precept of sasine".
Over time, sasine came to be used in common speech as a reference to the deed or document recording the transfer, rather than to the transfer itself. Hence phrases such as "to give sasines", "to deliver sasines", "to receive sasines", "to take sasines". Alternate spellings: sasin, seasin, sasing, seasing, sesin, seasin, sesine, seasine, saisine.  
A Register of Sasines was created in every locality by the Registration Act 1617. It functions to this day on a national level as the Sasine Register.  Transfers of property were originally by symbolic delivery, by handing over a clump of ground or a stone or similar object on the property itself, and then registering the "deed of conveyance" in the local "Register of Sasines". Actual sasines on the land itself was made unnecessary by an act of 1845. The "instrument of sasines" was superseded by the recording of the conveyance with a "warrant of registration" by an act of 1858.
- ^ Shumaker, Walter A.; George Foster Longsdorf (1922). The Cyclopedic Law Dictionary (Second Edition by James C. Cahill ed.). Chicago: Callaghan and Company.
- ^ "Scottish Language Dictionaries". http://www.dsl.ac.uk/dsl/. Retrieved March 1, 2008.
- ^ "The Records of the Parliaments of Scotland to 1707". K.M. Brown et al. eds (St Andrews, 2007), 1605/6/39. http://www.rps.ac.uk/. Retrieved February 15, 2008.
- ^ "Sasine Register". http://www.ros.gov.uk/aboutus/sasineregister.html. Retrieved March 7, 2008.