This looks like a snail mail forwarding service? Surely that's not mandatory to move somewhere else? I've never used this in Europe (moved 5 times), just tell the places that need to send me physical mail my new address
It does mean that you'll get your old mail delivered to your old place forwarded to your new place while the other folks mailing you get their ducks in a row. And honestly I can't think of all the places that might mail me.
Compared to what seems like a big mess of telling only the post and hoping everyone will get the memo from them, telling the utility, my employer, family, and a few insurances that I moved (updating the info on the self-service site or sending support an email) seems like the better solution to me