Resurrecting an old thread to talk about another situation where this can occur...

I was originally booked BUR-SFO-ORD for tomorrow, however the BUR-SFO flight tomorrow morning was cancelled today. I received a phone call this morning from a VERY helpful Burbank CSR who changed my entire itinerary to LAX-ORD-LAX non-stop (I would have preferred this routing originally, but a QUAUP ORD fare out of BUR is around $400 less than the non-stop out of LAX.).

When she did this, the itinerary became a bit of a mess, as the original outbound BUR-SFO-ORD segments remained there (assumedly to preserve the original e-ticket) along with the new LAX-ORD-LAX segments.

I called the 1K line to have them clean up the itinerary, and I asked them at that point to "revalidate" the ticket so that the fare basis code would change from "N/A" to the actual code - which would allow me to check-in online. However, because the origin and destination had changed (BUR to LAX), they weren't able to simply revalidate the ticket - ticketing had to "fix" it through some sort of manual process. Voila - 3 hours late, my itinerary has been revised with the proper booking class "A", and "INVOL" as my fare basis code.

This not only now allows me to check in online, it also allows me to pretty much take any flight out and back that I want (provided there's "A" inventory available) because my ITIN now shows I was "involunatrily" rerouted.

I so do love the 1K agents from time to time.