How do i account for refunded expenses in reports?

TravelForAV_C Expensify Customer Posts: 1

For example, if I purchase a roundtrip Amtrak ticket and the return leg of the trip is canceled, Amtrak refunds me that half of the trip. Unfortunately, Amtrak doesn't provide an updated receipts with the reduced price unless you request it via email and you have to wait 2 weeks to a month to receive correspondences. I need to bill my client sooner, is there anyway to attach a refund receipt to a previous expense? Do you have a means of working around this?