The default settings in Dota 2 prevents non-friends from sending game invitations to you, this includes invitations from Challengermode.
To participate in our tournaments, you will need to adjust your Social Settings and allow game invitations from non-friends.
This article will explain the process of adjusting your Social Settings in Dota 2 to allow in-game invitations to the matches in our Tournaments and Leagues.
Go to Settings
On the start screen of Dota 2 you will find Settings in the upper left corner, the cogwheel icon, it's been marked in the example image below.
Click this button.
Go to Options - Advanced Options
When you're in the Settings window, click Options in the upper menu bar of the Settings window.
While in Options you will find Advanced Options at the bottom center of the window, click the text to move to the next step.
Allow invitations from non-friends
In Advanced Options you will be able to Block or Unblock party invitations from non-friends. If this option is checked, you are blocking invitations from non-friends, this includes Challengermode.
Uncheck this box.
Correct Social Settings
After unchecking the box, your social settings should look as on the example image below - you are now able to receive game invitations from Challengermode.
Running into other issues, or do you have additional questions? Feel free to chat with us by clicking (?) on Challengermode.