The newest Alt-J pre-sale code is now on TMPresale.com. During this Alt-J presale everyone who has the password will have the chance to order tickets before the public. If you don't purchase your tickets to Alt-J's show in San Diego, CA during the presale you might not be able to buy them before they become sold out.
Here are all the Alt-J show details:
Alt-J
Humphreys
San Diego, CA
Apr 19, 2018
Presale
Start: Thu 02/22/18 10:00 am PST
You can use this presale codes and information to get tickets:
Join right now and you'll instantly unlock the presale passwords you need to buy your tickets before the general public to this and hundreds of other events