The owner of a stock certificate is responsible for its safekeeping, but accidents and unforeseen disasters can occur. Most banks, agents, companies and firms have procedures in place for these occurrences. According to the U.S. Securities and Exchange Commission (SEC) the owner is responsible for taking immediate action to prevent the lost or stolen certificate from being accidentally traded or transferred. It is also recommend that the owner keeps copies of both the front and the back of the certificate to aid in the process of getting it replaced.