Originally Posted by LHR/MEL/Europe FF

I wouldn't be drawing attention if you don't need to.

While the agent should always give you the option of leaving the ticket as it is (for the same amount of miles), there has been the odd incident where the agent has gone ahead and made the change. By then it's opening a whole can of worms.

There are two types of action... a simple change such as time is just a revalidation. It's the same ticket, just updated.

When you start to request more complex changes, the ticket may need to be reissued. When you have a reissue, that's like a new ticket. So you can start to get questions over what you paid previously.

Reissues for involuntary changes are not likely to result in penalty. Reissues for voluntary changes are again inviting scrutiny.