Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Example Input: I have a refundable ticket taking me from 'A' -> 'B' and then 'C' -> 'A'. However, I have now made further plans, so that I do not need the C -> A ticket anymore. So, given the limited travel budget that I have, I'd like to have the return / final leg of journey refunded. 

The cost of the total flight was less than the one-way tickets from A -> B would be now, so it does not make sense for me to cancel the entire itinerary. I'd like to travel on the first leg, and have the second leg refunded if possible. 

p.s. I am not getting off at any layover. The flights from A->B and C->A are more than 15 days apart and I have my own ways of traveling from B->C independent of the airline. 

Example Output: Can I have the final leg of a multi-city flight refunded?

Example Input: I am a US citizen who will have worked for 89 days in a Schengen country while on a 90-day tourist visa.

What exactly is my best strategy at US border control? Should I admit to working while travelling, or lie and say I was on vacation?

I fully intend to declare the income earned on my taxes for this year, but I simply want to minimize trouble at the border.

Example Output: Returning to US after illegally working in the Schengen area

Example Input: When travelling between France and the UK via the Eurostar train, I have never actually been stopped by customs on either direction. I've seen some people being stopped, but it seems that it's on a somewhat random basis.

I'm considering traveling by coach this time, but I wonder if the customs are more strict, e.g. should I make sure to have receipts for all my electronic equipments (laptop, camera, etc.) and fresh fruit (to prove they were bought within the EU)?

Also, for coaches travelling during the night, is the procedure lenghty? The coach website displays the total travel duration, but not the amount of time one should be "awake" (e.g. waiting for customs or something else), so I wonder if I would be able to sleep during most of the time or if I'll spend, say, one hour waiting for customs clearance, or something like that.

Note: my question is more about the practical situation of a coach-based customs (which I have never actually been through) than the theoretical fact that one should always bring receipts for each valuable item in their luggage.

Example Output:
Customs in coach travel between France and UK