Among the various practices in antiquity designed for administrative control of storage facilities and archives is the stamped clay sealing applied to the wooden lock of a closed door. This specialized type of door-lock sealing is still quite rare in the archaeological record. The discovery during the 1992 excavation season of an exceptionally preserved clay door-lock sealing in the late Middle Bronze Age (MB III; 1590-1530 BCE) sacred precinct at Tel Haror, Israel, is the first to be identified in this region and the first to be recorded in a temple context and is the subject of this study. This unique find qualifies for a detailed description, and for a reconstruction of its lock, key and sealing, as well as a discussion of the locking mechanism system, following the pioneering research on the outstanding corpus of such sealings from Arslantepe, Malatya. In addition, the archaeological context of the sealing and its possible association with the temple will be discussed.