> Why tenants don't change the locks on the main doors as they move in? Is it also because of the contracts? In some countries it's not allowed to change it wi

> Why tenants don't change the locks on the main doors as they move in? Is it also because of the contracts? In some countries it's not allowed to change it without permission from the landlord, and in others it is allowed but you need to immediately give them a copy of the key anyway. But I believe that in most countries it is the case that the landlord cannot invade your privacy, even if they have a key (I know this is the case in Australia). So them having a key is mostly irrelevant (since lockpicking is a skill you can pick up in a weekend -- and picking the lock of a tenant's door is about as legal as using a key that the tenant was forced to give you).