It is always possible for a limited number of tickets to become available after an on-sale. Sometimes the venue or promoter will release additional tickets. Also, in the course of processing orders, we may find accounts that are over the ticket limit, need payment or do not have the correct billing address. In these cases, the order may be cancelled and the seats released back into the system for sale.
We are unable to state an event is sold out until the promoters of the event give us authorization.