Looking to buy tickets to the NFC Championship Game between the San Francisco 49ers and Seattle Seahawks at CenturyLink Field in Seattle? If you have a credit card with a billing address in California, you will not be able to buy tickets through the Seattle Seahawks’ web site, the team announced.

Tickets, which go on sale Monday, will only be available to fans with billing addresses in Washington, Oregon, Montana, Idaho, Alaska, Hawaii and the Canadian provinces of British Columbia and Alberta.

If you have a billing address outside these areas, you will have to go through secondary ticket markets like the NFL Ticket Exchange and Stub Hub.

The move heavily reserves seats in the stadium for the Seahawks’ fan base known as the “12th Man.” It is also an attempt to limit scalping.

The NFC Championship Game will be played on Sunday Jan. 19 at 3:30 p.m. PT.