You find the Link under "Embassies" "settings.->
You see it in the following picture: the last numbers are the ID-numbers and different for any player.
Why is it double?
It's not double … the other one is the robber link with wich you can get gold from friends.
What is that thing good for?
- if a friend registers with using this link you get 5 PC's after his first logg in
- if there is a problem and you write to the support at ed.ladnog|troppus#ed.ladnog|troppus you have to add this link to your message so they can find out your account (more easily)