You can order replacement keys from a locksmith in your area. Depending on which kind of cylinder you are using, you can submit either a sample key or a code number for the order. If the cylinder has an owner protection card, the card must be presented. In this case, delivery might take a few days since the locksmith cannot make the key himself, but must request it from ABUS. Other replacement keys - also those with a code card - can usually be made by the locksmith right away.
The owner protection card of a cylinder guarantees that only people who have the right to do so can get your key copied. It authorizes the cutting of an identical key and must be presented to the locksmith.
Sometimes keys are given away thoughtlessly in private and also in professional life. If the new user of the key has the wrong intentions, “black” keys can easily start circulating without the knowledge of the key's original owner. This can cause you to lose track of how many keys are in circulation and which people have access to your building.
The solution: Replace your door cylinder and use a cylinder with an owner protection card. Locksmiths who carry ABUS products will gladly advise you in this matter. Additional keys can only be created for the cylinder if the owner protection card is presented. That way you have peace of mind knowing that no illegal copies of your key exist.