Q. It says "That summoner has been certified by another user." when I try to post.

To prevent impersonation, only the owner of the summoner account linked to their OP.GG account can create posts on Duo.

If you see the message that says 'That summoner has been certified by another user.' while trying to post, it means the summoner account is already linked to another OP.GG account.

I still have issues after linking my OP.GG account.

Please make sure that you are signed in with the correct OP.GG account linked with your summoner account.

I don’t remember which OP.GG account I linked.

If you have more than one OP.GG account, you can re-link your Riot account to a different OP.GG account.

Follow the steps in "How to re-link your Riot account" to link to a new OP.GG account.

Q. How do I link my Riot account?

Click here to learn how to link your Riot account to your OP.GG account.

Once linked, your posts will display a Riot symbol and the "Certified" badge.