If you travel with small children, you no doubt have taken a stroller, car seat or some other essential on board an aircraft. These days, with full flights, you'll most likely have to gate check the item. This means leaving your item at the end of the jet way as you board, and picking it up after your flight in the same place, or at baggage claim. We have found that this is a fairly convenient strategy.

In the rush of boarding and keeping track of kids and your belongings, you were probably asked to sign a tag which was then attached to your stroller. Like us, you probably didn't bother reading the fine print. But after a recent flight on Northwest Airlines, we did, and we were surprised to learn what the airline