My regular trips to Lagos have completely vanished a couple of years ago, but I remember being asked (or even demanded) for money when passing through immigration and upon baggage collecting. Not to mention the amount of people walking away with your luggage, apologizing by saying "sorry, my bag is
exactly like that!"...
I do remember one incident where I had a ticket in AZ biz class from ACC. I was told that C was overbooked as there were more passengers boarding in LOS (stopover) and the check-in lady said that if I wanted to sit up front all the way I would have to pay her a reasonable amount of Cedis. I really didn't expect this in Ghana (thank you mr Rawlings

) and I refused to give her anything. She wasn't very kind from then, but she did give me a BP in 1A and somehow there were only three pax in C all the way to Milan...