Belgium Netherlands cross border working
As per the rules for cross-border work between BE and NL in the link below the 3rd requirement states that the person must return back each week to the home country. Question in my mind is how does the person prove that he/she returned back each week and is it even necessary and why and where is it necessary for?
Secondly if the worker returns after 2 weeks because he/she could not make a certain weekly trip, is there a consequence to that and what sort of?
Thanks in advance.