How it works

Oasis codes are the only public way into this weekend's sales. There is no general onsale sitting behind them.

Registration closed on Thursday 17 September at 4pm UK time. It was separate from the Oasis mailing list. One entry, up to three cities in preference order, free, and the details could not be edited after you sent them.
Duplicate, bulk, and automated signups were thrown out. Some venues also have age rules. Check the venue before you buy.
Selection is random. A registration does not mean a code is coming.
If you are picked, one email arrives between 24 and 27 September from oasis@openstageit.com. It carries a code and a Ticketmaster link for one city and one window.
Open the waiting room up to 30 minutes early. Log into Ticketmaster with the same email you registered with.
You can buy up to 4 tickets if they are still on sale. The code does not hold seats for you.

Accessible tickets are handled by Ticketmaster and differ by venue. Later on, unwanted tickets can be resold at the price paid through Ticketmaster, or through Twickets for UK shows. Those resale routes are not open this weekend.