Every Travian account can be present in the group only once. That means that if you're playing with a dual, you will need to add him to the Travco group as your dual, too. To add a Travco dual, follow these steps.

1. go to your profile
2. in the navigation menu, click the Dual membership invitations button
3. click the green plus button and select the group membership you want to invite your dual to
4. copy the link generated in previous step and send it to your teammate

About dual accounts

• Dual accounts can't access anywhere else outside the group they have been granted access to (i.e. you don't need to worry that your dual will have access to other groups you're member of, your account details etc.).