The American Loyalists Claim Commission was a commission created by the British government to address claims of property damage by loyalists during the American Revolution. Established by act of parliament in July 1783, the commission paid out its final claims in 1789 ( Maya Jasanoff, Liberty’s Exiles: American Loyalists in the Revolutionary World (Albert A. Knopf, 2011), 121, 142). Because of a high requirement for detailed records and legal documentation of claims, women and people of color tended to receive lower pay outs (Liberty’s Exiles, 134-135).
The records of the commission are held by the UK’s National Archives. The catalog entry for the collection can be viewed here. Records from the collection have been digitized by Ancestry and can be accessed through their “UK, American Loyalist Claims, 1776-1835,” database (subscription required).