The ALT-J presale code has been added: During this special presale you have got a good chance to acquire show tickets before they go on sale. 
Don’t miss this terrific opportunity to see ALT-J’s show in Chicago, IL!!
Here are the ALT-J performance details:
ALT-J
Riviera Theatre
Chicago, IL
Mon, Sept 9, 2013 07:00 PM
Onsale to General Public
Start: Sat, 07/13/13 10:00 AM CDT
Presale
Start: Fri, 07/12/13 10:00 AM CDT
End: Fri, 07/12/13 10:00 PM CDT
You can use the following presale codes and information to buy tickets:
Here is a hint: When a presale password is not found in ticketmaster or livenation – double check that the presale is still valid: you could be looking at an old presale, secondly remember that there might be more than one presale happening – if there are multiple boxes where presale passcodes can be entered you may need to try a few different combinations to find the right one.