I am a Dane. I have twice received mail incorrectly sent to my current address. One was sent to somebody with a different name, to an address that was close to but not the same as my previous address, the other was to a person who may have lived here but was not the previous occupant.
This does not include the letters that should have gone to my neighbors but was put in the wrong letter box.
While I naturally assume this is deliberate I won't rule out that this is just complete incompetence.