You have probably seen keys that are stamped ‘Do Not Duplicate.’ We want to set the record straight on this very important issue in our industry and offer some more secure options.

Myth: “Do Not Duplicate” keys are more secure than regular keys.

The first thing to note here is that the ‘Do Not Duplicate’ marking is meaningless.  It is just text stamped on a key. Nothing about the key is more secure or different from a regular key.  In fact, typically keys stamped “DND” are the most common and least secure key types on the market. ‘DND’ keys have become popular because locksmiths can sell them at a premium price as consumers incorrectly believe these keys are more secure. That is why the Associated Locksmiths of America have a very clear policy on this:

“Orders for keys stamped “Do Not Duplicate” or similar wording will be handled in the same manner as any unrestricted key. ALOA members should inform the consumer that the use of keys stamped “Do Not Duplicate”, or similar wording, is not effective security, and further that the use of such words is deceptive because it provides a false sense of security.”

These stamps provide absolutely no additional security and have no legal enforcement backing them.

So, if “DND” doesn’t mean anything, what does make a key more secure?