Do Not Duplicate (DND) keys are used by post offices and high-security homes or offices in order to control access. You can have your own Do Not Duplicate key made by contacting a commercial locksmith or one of your local locksmiths. However, even with a “Do Not Duplicate” stamp, keys are still often easily and readily duplicated.
The easiest—and cheapest—way to make a Do Not Duplicate Key is to have it stamped “DND.” Most key duplication locations and hardware stores will respect a keystamp. But unfortunately, key stamping provides no additional mechanical or technological protection from actually being duplicated.
A more expensive option is to ask one of your local locksmiths in San Antonio to install a restricted keyway that is registered only to a specific household or company. Restricted keyways use special keyblanks that are either controlled by the manufacturer or a trusted locksmith. Keys can thus only be copied with special authorization by you or your company.
In addition to difficulties with managing duplication and security, keys also don’t record data about building access, and can be difficult to distribute and manage. If you’ve decided that keys are not the best option for security for you, contact San Antonio locksmiths like those at to install card access or electronic access that can install secure, keyless access.