Crows fans have one last chance to win a Premier membership by scanning this QR code.

The QR code - which can be scanned on most smartphones and iPads - has featured in the Crows ad on dozens of bus shelters around Adelaide.

But now here is another chance to enter the last week of the competition.

Once the QR code is scanned, Crows fans only need to complete a few basic fields and they will be in the running to win one of three Crows Premier memberships.