That's not true. In Austria at least, a landlord certainly can't enter a rented-out apartment unannounced.

I replied to a wrong comment and didn't notice. What I meant is that changing locks is entirely legal in EU.

That's..terrifying.

I've never heard of an EU country where it would be legal to enter without ample warning time.

And also completely false!

Yes, I replied to wrong comment, sorry. I meant that changing locks is entirely legal.