I think this is an official petition, so, there are legal requirements to identify yourself as a citizen of an EU country. Depending of your country they ask f

I think this is an official petition, so, there are legal requirements to identify yourself as a citizen of an EU country. Depending of your country they ask for different data. For instance, for Finland they ask the physical address but for Belgium only the national ID number. I suppose that there is not such number in Finland or it's illegal to ask for it. There is a link in the form to the relevant regulation. So, the website looks legit. Of course, that doesn't mean that it's legit but my gut feeling it's that they are.