Z-Wave is smart technology; not a brand. Contacting a distributor (like us) for information on a lost password, unfortunately, won’t get the desired results. ZWaveProducts.com does not maintain any passwords or have access to Z-Wave networks. The best course of action is to contact the real estate broker who handled the sale. Perhaps he or she can contact the seller with more information. Also worth a try is the actual manufacturer of the device. They may be able to help with a factory reset (depending on the device). Please keep in mind, for security purposes, there is no ‘universal’ password that we can supply to get you into your security system or Z-Wave gateway.