The first and most important thing to do in the case that you misplaced your safety deposit box key is to keep looking! The process to replace your key is long, annoying and expensive. If you lost the key for a safety deposit box, it may cost you. They are opened when the key given to the owner of the box and the key held by the bank are used simultaneously.
These boxes are individually secure containers held in banks that act as storages that protect against theft, fire, floods, etc. Many people invest in safety deposit boxes to hold their jewelry, money and important documents.