User Guide ReferIO has only one simple command: /refer [my|new|clear|key]. You want to invite someone Just use /refer or /refer new. If all works fine you'll get this response: Referal added. Give this hash to your friend: AABBC Depending on the server settings you might get: Maximum pending referals reached! That means that you'll either have to wait until one of your keys will be used or you can clear the pending requests with /refer clear. You can check all your referals with /refer my You want to use a key Just use /refer to use your key and you're done. After that a time counter starts and checks for your playtime. If you have played long enough the rewards will be unlocked. You can check your time counter with /refer my