"When Patch 3.7 arrives in May, we'll be rounding up inactive accounts to make those summoner names available to players. To make it easier for you to pick up a new summoner name, we're also putting name changes on sale for 50% off.
An inactive account is any account level 5 or below that hasn't played a game since January 1st, 2013 or any account level 10 or below that hasn't played since January 1st, 2012. To keep those accounts' names, you'll have to log on and play at least one game between now and Sunday, May 12th, at 11:59 PM PDT. If you miss the deadline, don't worry - your account is still active, but you'll be prompted to choose a new summoner name when you log in next time. Only inactive accounts are at risk to lose their summoner names.
From the release of Patch 3.7 through May 26th, summoner name changes will cost 650 RP, down from their normal 1300 RP price. With Season 3 in full swing, it's a great time to showcase both your skills and your creativity to your opponents.
We look forward to seeing your dazzling new pseudonyms on the Fields of Justice soon!"