What is residual value on an airline ticket exchange?

Thanksgiving falls on November 26, and the change requests are already arriving. Some of those travelers will trade down to a cheaper flight. When the old ticket was nonrefundable, the difference has a name in the ARC world: residual value. Issued on time, it becomes credit the traveler can use later. Issued late, it can slip out of the report and out of the traveler's hands.

What is residual value?

It's the balance left over when a nonrefundable ticket is exchanged for a new ticket worth less. ARC describes a residual value MCO or EMD as the result of exchanging a nonrefundable old document that has a higher value than the new one.

The airline decides whether that balance survives. When its policy allows the transfer, the agency puts the balance on an MCO or EMD tied to the new ticket.

When does an airline allow it?

Each carrier sets its own rule, so start with the airline's agency policy. Delta's is a clear example. US agencies that settle through ARC may issue a residual value MCO in two cases:

• A downgrade before departure. The passenger moves to a lower fare before the originating flight leaves.
• An unused ticket put toward a cheaper one. A wholly unused Delta ticket, starting 006, pays for a lower-value ticket.

Delta lets the remaining value, less its administrative service charge, go on the MCO. Other airlines set their own terms. Check the carrier's page before you price the exchange.

Do you issue an MCO or an EMD?

It depends on the airline and your GDS. Delta asks ARC agencies to use an MCO, while BSP agencies outside the US use an EMD-S. ARC also handles a residual value EMD issued in the GDS as part of the exchange. ARC says that option depends on the airline's ticketing policy and on your GDS supporting it.

A GDS-issued residual value EMD carries two details that matter later in IAR:

1. The ICDN field. "Issued in connection with document number" holds the new 13-digit exchange ticket number.
2. A reason for issuance sub code. ARC accepts three for linking.

Enter both at issuance in the GDS. IAR hides them on the EMD transaction, so the GDS is the place to get them right.

How does the residual value link to the exchange in IAR?

IAR links the two automatically when the ICDN and an accepted sub code are present. ARC calls the result a companion exchange. Issue the MCO or EMD on the same day as the exchange, so both documents reach IAR together.

Timing matters because of Expedited Exchanges. Error-free exchanges lock down the next business day and go to the airline. A residual document issued on a later day links while the exchange is still unreported. Once the exchange has gone to the airline, the link is out of reach.

If either detail was missed in the GDS, link the EMD to the exchange by hand in IAR. ARC's warning is plain: an unlinked EMD can leave your customer charged its amount, when it should have been credit for future travel.

What if the airline's rule forfeits the balance?

Some fares follow a use it or lose it rule. Here ARC recommends raising the exchange penalty to include the residual value before you issue the new ticket. If that step slips, change the Admin/Penalty field on the Exchange Support screen, or the Adjustment field on the Exchange Summary screen, by the next business day.

What rules travel with a residual value MCO?

Delta's policy shows what to record with each one:

• One year. The MCO is valid for a year from issue and must be exchanged for a Delta ticket within that year.
• Nonrefundable. It's nonrefundable and nonreversible, and the replacement ticket's endorsement box shows the nonrefundable amount, taxes included.
• The named passenger. It applies to a new ticket for that traveler, with an exception for a corporate name change.
• Keep it safe. Delta treats a lost or stolen MCO as gone for good, and debit memos need another form of payment.

How do you keep residual value safe through the ARC week?

We'd build four habits around it:

1. Reconcile daily. ARC asks agencies to reconcile the sales report every day, and a residual document that failed to link shows up on day one.
2. Check links before you authorize. Every exchange with a lower new fare should show its companion document, or a penalty that covers the balance.
3. Track the expiry. Log each MCO with its traveler and the date it runs out, beside your other unused credits.
4. Write it in the PNR. A short remark with the MCO or EMD number lets the next agent find the value fast.

Residual value is small money per ticket. Across a holiday season of exchanges, it adds up to credit your travelers expect to find when they book again.

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