Originally Posted by
Expatbear
What are the risks that I need to know about? I thought it was just that I asked to pick up bags in LHR due to a 12+ hour layover, picked them up and just didn't get on the onward flight. If it's the last flight of my ticket, doesn't matter that it's invalidated, right?
The risk is that if an audit determines that you did not return to the country of origin, then the airline has the right to charge your credit card for all the flights as the sum of individual one-way fares. Very expensive. Odds are very low, but it is a risk. Many threads about this if you use the right search terms (which I have yet to figure out)