IU requires original receipts for ticketless travel if not prepaid by IU or purchased through a designated travel agency or Orbitz for Business. Ask for a paid receipt at the time of booking or at the ticket counter. It is expected that every effort will be made to obtain a receipt whether it be before or after the fact.
If it is not possible to obtain a receipt, proof of payment and a statement that the fare was economy class is required. Acceptable proof of payment is a canceled check or a photocopy of a credit card statement. A claim made without the original receipt must be guaranteed with the traveler's and account manager's signatures on the travel management Exception to Policy Form (PDF).