The point is: I really don't want uncontrolled access methods to my home floating about in the universe. So if you absolutely must flaunt restrictions that are there to protect your safety and that of others, at least have the discipline to keep a detailed record of who has the keys and attach "rehoming" tags to the keys of anyone liable to lose them. I guess the smart move would be to have copies made right at the start, rather than when one of the originals goes missing. Your landlord will definitely notice a number mismatch of a copy and then you may end up with a whole new set of problems. Ensure that all copies are returned to you and destroyed when you move out. And remember: You may be best mates / deeply in love right now but things can change very quickly. More than one friend of mine had to cough up for a missing key following an unhappy breakup.
Tom
If its a dotted key, there is likely to be a problem. Firstly having it cut may not be easy as some have discussed, many locksmiths cant/wont. But it will also be numbered. This may be in your contract. So you would also need to have the serial number copied, which is extremely unlikely any one will do this.
The rest is down to your building and agency. They may just charge to change your locks, perhaps 700 to 1000. But if they decide to change the buildings locks, well its those figures times the number of flats. But I think thats unlikely to be honest.
To be on the safe side I would consider where you lost it. Perhaps you lost the key in Australia and it fell over board while on a boat...I hope you didnt lose it close to home and unsure where it went.
They may also have an exclusive agreement with the likes of Mister Minit to not stock "Kaba-compatible" keys, or at least to offer them some other attractive deals if they agree to such a deal. And with KABA having such a leading position on the Swiss market, nobody really wants to be black listed by them.
Which doesn't mean to say that grandpa Reto who has a key cutting machine in his basement won't cut you a copy if you ask him nicely. And that he won't have to fear the police kicking in his door even if somebody does report him.
Disney, Marvel, etc would have seen their copyrights lapse long ago if IP rights duration weren't extended again and again. US commercial interests are the reason for that.
Money makes the world go round.
What's the difference?? If I move into an new flat and some stranger raids it or visits me uninvited at ungodly hours it makes absolutely no difference if they found an original key or a copy. g
Kodak invented the digital camera in 1975, their patents expired in 2007 hence everybody is making digital cameras & Kodak is not getting any royalties.