Hamvention Mail Order Ticket Sales Are Closed.

Mail order ticket sales are closed. Any orders postmarked after April 30 will be returned unopened.

Most foreign orders will be held at will call including online orders as there may not be sufficient time for them to be received via postal service. If you order online and want the tickets mailed anyway please indicate so in the order comment box.
Source: QRZ News
Link: Hamvention Mail Order Ticket Sales Are Closed.