Are you bringing food or other animal products into the EU from a third country, or are you traveling with your pet from a third country? Do you trade in animal feed? Then the Veterinary and Import Office is the right contact.
If you would like to provide certain services in other EU countries, you will need the EU certificate as proof of your professional experience for some EU countries (e.g. Austria, Belgium, Luxembourg).
If the other parent lives abroad and does not pay maintenance to you, you can assert your maintenance claim abroad. You can get support in enforcing your maintenance claim.
If you are a German citizen, you can apply for a passport. You will need a passport, especially if you want to travel to a country outside the European Union.
