Will ace hardware duplicate keys that say do not duplicate?

[McRosalie]

Ace Hardware stores will not duplicate keys stamped "Do Not Duplicate" as a standard policy, as they are not bonded locksmiths and must adhere to legal and ethical guidelines. However, if you are the verified owner of the key—such as for your own home, business, or personal padlock—they can often copy it onto a blank without the "Do Not Duplicate" marking, provided the key type is commercially available.

The "Do Not Duplicate" (DND) stamp is a manufacturer's warning, not a universally enforceable law. Its primary purpose is to deter unauthorized copying for properties or systems where key control is crucial, like offices, hotels, or government facilities. Ace Hardware, as a retailer, respects this industry standard to avoid liability. Employees are trained to refuse service if the request appears unauthorized.

Most Ace Hardware locations can duplicate a DND-key if you can demonstrate ownership. This typically involves presenting the original key along with valid identification or proof of property, such as a utility bill or vehicle registration for a car key. The duplicate will be cut on a standard, unmarked blank. The feasibility depends entirely on the key type. Common residential KW1, SC1, or WR5 keys are almost always copyable. Specialized high-security keys (e.g., Medeco, Mul-T-Lock) or proprietary commercial keys require specialized blanks and equipment only a bonded locksmith or the original issuing authority can provide.

From a legal standpoint, copying a DND key without authorization can be considered a violation of policies or, in some jurisdictions, trespassing laws if used to access secured property. Ace Hardware's policy safeguards both the store and the customer. Industry guidelines from organizations like the American Society for Industrial Security (ASIS) recommend such retail refusals as a best practice for maintaining access control integrity.

If you need a legitimate copy of a DND key, your best course of action is to call your local Ace Hardware ahead of your visit. Explain your situation. If they cannot assist, they will likely refer you to a bonded locksmith who can verify your authorization and perform the duplication, often at a higher cost. For common residential locks, the process at Ace is usually straightforward and affordable, often costing between $2 to $5 per copy.

Scenario	Can Ace Hardware Typically Duplicate?	Key Consideration
Standard House Key with DND stamp	Yes, if ownership is clear.	Duplicate will be on a plain blank.
Mailbox or Padlock Key with DND	Yes, if you own the lock.	Subject to blank availability.
High-Security Key (e.g., Medeco)	No.	Requires authorized locksmith.
Corporate Office or Apartment Master Key	No.	Strict key control; must go through property management.
Vehicle Key with DND stamp	Possibly, if it's a basic mechanical key.	Modern transponder keys require programming elsewhere.

Ultimately, while Ace Hardware is a convenient solution for most everyday key copying needs, their responsible policy regarding "Do Not Duplicate" keys protects property rights. For legitimate owners, it's rarely a hindrance for simple keys.

[LenaAnn]

As a general contractor, I deal with keys for client properties all the time. My local Ace is my go-to for quick duplicates. I’ve handed them keys marked “Do Not Duplicate” for job site sheds I own. They just ask, “This is your lock, right?” I confirm it, and they cut the copy on a plain blank. No fuss. It’s about trust and verification. They won’t touch a key if it looks like it belongs to an apartment complex or a business cabinet I shouldn’t have access to. For those, you need to go through the proper management channels. Their policy makes sense—it keeps them out of legal trouble and ensures only authorized copies get made.

[VonAnderson]

From a property management perspective, Ace Hardware’s policy is a helpful first line of defense for our key control systems. We use “Do Not Duplicate” stamps precisely to prevent unauthorized copying at retail kiosks. While it’s not a foolproof legal barrier, it significantly reduces casual duplication. If a tenant takes their apartment key to Ace, they should rightly be refused. This encourages them to come to our office for authorized copies, which we log. It’s a system that works on mutual responsibility. Ace upholds their end by respecting the stamp, and we uphold ours by providing a legitimate, traceable path for tenants to get needed copies. It maintains the integrity of our building’s security.

[Hylla]

I just went through this last week! I lost my only garage side-door key, and the only spare was this old brass one stamped “Do Not Duplicate.” I figured I’d try Ace Hardware before calling a pricey locksmith. The guy at the counter looked at it, asked if the garage was mine. I showed him my driver’s license with my address. He smiled and said, “No problem for a homeowner.” Two minutes and about three bucks later, I had two new silver keys without any writing on them. He explained they can’t replicate the “Do Not Duplicate” phrase, but they can make a functioning copy. It was a total non-issue. Super easy and saved me a ton of money.

[DiJulian]

The technical reason boils down to key blanks and liability. I’m a locksmith. Retailers like Ace Hardware stock common, unrestricted blanks. When they see “Do Not Duplicate,” their policy triggers to avoid copying a potentially restricted key. Many DND keys are for systems using patented, controlled blanks—blanks we locksmiths can only get through specific distributors after proving credentials. Ace doesn’t have those blanks, and even if they did, using them without authorization violates agreements with lock manufacturers. So their refusal is correct. For a standard Schlage house key with a DND stamp? It’s just a common SC1 blank. The stamp is cosmetic. They can copy it because the blank is unrestricted, but their policy forces the ownership question, which is good practice.