Copying a Protected/Registered Key (Sicherungskarte)
If you've lost your key or need a spare but your key is marked with a manufacturer's security card (Sicherungskarte), you face a common problem in Germany: many locks are fitted with registered or patented keys that cannot be copied freely. This protection exists to keep your home more secure, but it also means you can't simply hand your key to any locksmith or hardware shop and ask for a copy.
Understanding how registered keys work, what your Sicherungskarte is for, and how to get a legitimate spare will save you time, frustration, and potentially lock-out situations. This guide walks you through your options as an expat or international resident in Germany.
What Is a Registered or Protected Key?
A registered key (Sicherungsschlüssel) is one linked to a security card—your Sicherungskarte. Major German and European lock manufacturers, such as Abus, Assa Abloy, Mul-T-Lock, and others, use this system to prevent unauthorized duplication. Each key is numbered, and only the person who can prove ownership (by presenting the original security card) is allowed to order copies.
Your Sicherungskarte is a small cardboard or plastic card that came with your lock or was given to you when the lock was installed. It shows a unique key number and often includes the manufacturer's name and logo. Without it, a locksmith cannot legally order a copy of your key through the manufacturer.
- The card proves you own the lock and are entitled to copies
- It's kept by the lock manufacturer's authorized distributors
- Loss of the card doesn't make your lock insecure—it just complicates getting spares
- The system is common in German rental and owned properties
Why You Can't Copy a Protected Key at a Hardware Shop
In Germany and across Europe, most ordinary locksmiths and hardware stores (Eisenwarengeschäfte) cannot copy a registered key, even if you hand them the key itself. This is by design. The manufacturer has built the security system into their distribution chain, not just the physical key.
When you try to copy a protected key without the Sicherungskarte, the locksmith or shop assistant will likely refuse or explain that they need proof of ownership. Some may suggest you contact the lock manufacturer or the original installer directly. This isn't them being difficult—it's them respecting the legal protection system.
- Hardware-shop key machines cannot cut these keys—they're physically incompatible or software-locked
- An unauthorized copy could technically be produced, but most reputable shops won't do it
- Even if copied, the duplicate might not work perfectly due to tight tolerances
- The manufacturer's authorized network is the legitimate (and often only) way forward
Finding Your Sicherungskarte and Getting Authorized Copies
Your best first step is to locate your Sicherungskarte. Check the documents you received when you moved in or took possession of the property. Landlords (Vermieter) in Germany sometimes provide these cards, sometimes don't. If you rent, your Hausmeister or property management company may have a copy on file—ask them explicitly.
If you've lost the card, don't panic. A certified local locksmith can help you in one of several ways. They may contact the lock manufacturer to verify your identity and ownership, order a replacement card, or arrange for authorized copies to be made. This process takes a few days but is straightforward if you can prove you live at the address and own the lock.
- Search all documents: lease agreement (Mietvertrag), keys envelope, original installation paperwork
- Ask your landlord or Hausmeister if they hold a spare card for your lock
- Contact the lock manufacturer directly if you know the brand (Abus, Assa Abloy, Ikon, etc.) and can prove ownership
- A certified locksmith can guide you through identity verification and help request authorized copies
- Keep multiple copies of the card once you have it again—store one separately from the original
When to Call a Locksmith About a Protected Key
You need professional help if you've lost your key and your Sicherungskarte, if you've just moved into a place and don't have any documentation, or if you're locked out and need a solution fast. A certified locksmith in Germany is trained in navigating these systems and has relationships with authorized distributors and manufacturers.
They can also advise you on alternatives. In some cases, if the key is old or the manufacturer is no longer active, the locksmith may be able to open your lock and fit a new one with a modern key system—though this is more costly than simply copying an existing key. If you're renting, always check with your Vermieter before changing a lock, as this is typically not permitted without written consent.
Your English-speaking hotline can connect you immediately with a locksmith who will listen to your situation without the language barrier. They understand the German system inside and out and can explain your options clearly. Whether you need the card replaced, copies ordered, or an alternative solution, a quick call puts you in touch with the right expert.
Frequently asked
Can I make a copy of a protected key myself or at a shop if I have the original key?
No. A hardware shop or standard key-cutting service cannot copy a registered key without the Sicherungskarte, even if you show them the original key. The manufacturer's system prevents unauthorized duplication through both physical and administrative controls. You need the security card or proof of ownership to order an authorized copy.
I lost my Sicherungskarte. Can I still get a copy of my key?
Yes. A certified locksmith can help you contact the manufacturer, verify your identity and address, and obtain a replacement card or arrange authorized copies directly. You'll need to prove you own or rent the property—usually a lease agreement, utility bill, or ID with your address is sufficient. The process typically takes a few days.
What if I don't know the lock manufacturer or key number?
A locksmith can often identify the manufacturer from the lock itself or the key's design. If you have the original key, they can usually match it to the manufacturer and contact them for you. This is why calling a locksmith early is helpful—they have the expertise and contacts to track down the information you need.
Is a registered key more secure than a normal key?
Yes, in theory. Because copies can only be made with proof of ownership, it's harder for a stranger to duplicate your key. However, the lock mechanism itself is what determines true security—the registered system just controls who can get copies. Both registered and unregistered locks can be high-security; the Sicherungskarte system is a convenience and control feature for homeowners and landlords.
If I'm renting and lose my key, is the cost of replacement my responsibility?
In many cases, yes—the lease agreement (Mietvertrag) often states that tenants must replace lost keys at their own cost. However, terms vary by landlord and region. Check your Mietvertrag or ask your Vermieter directly. If the lock itself is faulty, that's the landlord's responsibility, but a lost key replacement is typically yours.
What should I do if I'm locked out and need help fast?
Call the English-speaking hotline immediately. A certified locksmith can attend quickly, assess whether you have a registered key situation, and either arrange emergency opening or help you get copies made fast. Don't wait—a locksmith can often resolve the situation within hours or arrange a temporary workaround while copies are being made.