A dual-key safe requires holders of two different keys to be in attendance in order to open the safe. This provides an extra layer of protection where non-returnable deposits are made. The shift supervisor or employee can make the deposit without having to open the safe or have the key for it. Once the valuable is dropped, there is no option of retrieving it without opening the safe. The dual-key safes are recommended for the businesses in the service industry, such as hotels, bars, restaurants, and more.