In some embodiments, systems, methods, and techniques relating to security and/or automation systems, collectively referred to as automation systems, may include determining a presence of a first device proximate at least one entry to a location, obtaining information related to an identification of an entity associated with the at least one device, authenticating the first device, the authenticating based at least in part on obtaining information related to the identification, and taking an action based at least in part on determining the authenticity.