As part of ongoing work to keep all players accounts safe, we rolled out email verification for any and all account credential changes. In case you’ve forgotten or haven’t had a chance to verify yet, we’re offering up a 4-win IP boost for everyone that establishes a verified email account. If you’ve already verified, you’re good to go.
We’ve implemented a two-step process so that no one can make changes to your League of Legends password or email without also having access to your verified email account. The system will send a message whenever a password or email change is attempted, so you’ll know the instant any suspicious activity occurs.
To activate email verification and shield your account from unauthorized access, click here and sign in or:
Head to leagueoflegends.com and sign in
Click your summoner name
Follow the prompts to establish a verified email account
http://eune.leagueoflegends.com/en/news/riot-games/announcements/earn-4-win-ip-boost-verifying-your-email