Not sure what your discount broker is telling you. If it is saying you will have already confirmed tickets to pick up at the box office when you arrive and it will give you a receipt for that, then no problem. That is how Cirque works -- you can buy tickets with confirmed seats in advance but then wait to pick-up at box office when you arrive, or Cirque can send the actual tickets to you in advance (for a small extra fee). If, instead, what your broker is saying is that it will give you a receipt for tickets but you have no confirmed tickets and seats then something smells in the state of Denmark.