I don't want to sound too cynical but I don't know of an ombudsman which has binding authority. Here in the Netherlands all ombudsman I know are non-binding.
I personally know of 2 dealings with an Ombudsman in the Netherlands. One involved me personally and another one of a good friend. In both cases the ombudsman advised in our favor. In both cases the reaction on the advice was: "Thanks for the advice, ombudsman, but we are not going to act on it.".
A non-binding ombudsman is in my experience just a paper tiger to make an organization look good and I have never seen a binding one.
Ive had an experience with an Ombudsman in the UK. I was stuck in a loop with a major broadband provider in the UK who were giving me the run around. I contacted the ombudsman and within 14 days of my first email the company resolved the issue, (after 4 months of back and forth before that). Despite being non binding, the moment they were involved my problem was resolved.
I personally know of 2 dealings with an Ombudsman in the Netherlands. One involved me personally and another one of a good friend. In both cases the ombudsman advised in our favor. In both cases the reaction on the advice was: "Thanks for the advice, ombudsman, but we are not going to act on it.".
A non-binding ombudsman is in my experience just a paper tiger to make an organization look good and I have never seen a binding one.