The role of the sitters and duals is to play on your avatar to help you take care of it. As a result of this, they have the ability to change most things within your avatar, so you should only choose players that you absolutely trust.
Dual vs sitter
A dual is someone who does not already have an avatar on the game world, who you invite to play on your avatar. You can have multiple duals playing with you. Each dual needs to have their own lobby account. Duals can do everything on the avatar.
A sitter is an existing avatar on the game world from your alliance or confederacy. Owner and duals playing on that avatar may access your avatar to take care of it when you are unavailable. Their access is limited and you can further restrict specific actions they are allowed to do. You may only have a maximum of two sitters at any one time.
You should never share your password with neither duals nor sitters.
You may add a sitter on the "Sitter" tab of your preferences and give permissions. You can also view the avatars you have permission to sit for.

Note
The Buy and spend gold permission is important, with it set they can purchase gold on your avatar and spend without limits, refunds cannot be given for gold spent by the sitter.
Sitter Login
When you are added as a sitter for another avatar you can log into it through the sitters button in the top right corner of the game. In the same place you can later return to your own avatar.
Every avatar starts with 14 days of owner inactivity allowance. (A sitter may log in at any time without affecting this allowance).
- For every day that any of the SITTER IS ACTIVE on the avatar AND any of the owner(s) of the avatar ARE NOT active, 1 day is subtracted from the allowance.
- For every day that any of the owner(s) of the avatar ARE active, 1 day is added to the allowance, regardless of sitter activity.
- If both OWNER(S) and SITTERS are NOT active, no allowance is added or subtracted.
To make it simple:
If only owner is active = +1 day
If owner and sitter are active = +1 day
If only sitter is active = -1 day
If nobody is active = nothing
Once the avatar reaches 0 days of owner inactivity allowance, the sitter’s access will be revoked.
- Avatars will not be able to gain more than 14 days of owner inactivity allowance.
- Whenever the allowance is running out (3 days left) a permanent info box will be displayed for anyone that manages the avatar to remind them.
A dual is another player that can access your avatar and have full control over it, including access to the avatars that you are sitting for. Generally, you do this if you do not have the time to run an avatar entirely by yourself.
Since the introduction of Lobby, duals can be added and managed in the Lobby and there is no need to share password to the avatar anymore.
You should make sure you trust the player before adding them as dual, because they will have full control to do almost anything to your avatar.
Requirements
You and players you want to add as duals must have your separate lobby accounts. If you don’t have them yet, you can create them very easily on travian.com website.
There is currently no limit on number of duals added to an avatar.
The dual cannot play on more than one avatar on the gameworld. You can either have your own avatar or play as a dual on one avatar on the gameworld.
There are no restrictions on how often the dual accesses the avatar or whether the owner of the avatar is actively playing on it. For the purpose of sitter restrictions, dual activity counts the same way as owner activity.
Adding duals
The owner of the account can add and manage the duals in the lobby. In general, buttons related to duals are colored blue.
First, the owner of the avatar adds the dual in the lobby. You need to know the full lobby account name of the dual.
Then, the dual has to accept the invitation.
Removing duals
Removal of duals works in the same way, in the lobby. The dual can also remove this connection any time in their lobby.