We have a round trip ticket we bought months ago leaving tomorrow night, but because of scheduling issues we can't fly at the time of the flight. But there were later flights available from Iberia so I called and asked if we could change our flight. They said they couldn't help us with that, but we could buy another ticket and fly out and use the return portion of our ticket without cancellation.

I was a little skeptical about this but found an old thread that indicated Spanish courts required that Iberia honor the full ticket even if the first leg was missed/cancelled.

So we bought a second ticket to fly out later, and I've checked in with that second flight. What should I do about the original flight? Should I check in? I want to make sure our return ticket is honored.