This document expresses the views of the land surface temperature (LST) and emissivity focus area of the Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV) Land Product Validation (LPV) subgroup. This focus area provides those involved in the production and validation satellite-based LST products with a forum for documenting accepted best practices in an open and transparent manner. The LST product validation best practice protocol document (V1.0) presented here has undergone scientific review by remote sensing experts from across the world. All comments and suggestions have been carefully considered to formulate this consensus document, which is freely available on the LPV Subgroup website. Furthermore, a list of recommendations arising from the findings in this document is also provided at the LPV webpage. It is expected that this best practice protocol will be a living document and that recommendations within will undergo regular revisions based on community feedback and advancement in the science of LST.