If you are a resident of a European country, then you also have the right to stay or live in any other EU countries. This article talks about where to pay taxes, especially when pensions from any other country do to affect your benefits. Here are some of the pension rights through each of them:

Apply pension authority through where you are live or have worked last. In case you never worked in a European country or several European countries where you might have also lived and worked. If you have never worked in a country where you lived, the host country will be forwarding the claims to the ones you worked in.