Some United Airline Receipts are not swing up in Concur Expense List

[TomBritton]

I  have expense charges showing up in my expense report details screen and have an error posted indicating I must include a receipt.  I have no way of obtaining this receipt.

[KevinD]

@TomBritton Did you book your flight using Concur Travel or did you book directly with United? 

[TomBritton]

All travel was booked through Concur - or with assistance  from CWT Travel agency 

[TomBritton]

Problem resolved.

I contacted travel agency who was able to manually send me copies of  airline receipts - a process error on their part caused the receipt  to have not been posted along with the charge automatically at the time of booking.