Possible armchair logger, what to do. in General geocaching topics Posted January 11, 2011 Or he could have been in an airplane. It would be completely possible to have done some caches before and after the plane ride, especially if a layover or something was involved. Of course, if there are lots of "layovers" then I would simply ask, "Are you sure you are logging on the right cache?" Maybe even throw in an obvious "verification" question that he would know the answer to had he been there, such as about the parking lot or something. Something like, "Hi, thanks for logging. Please double check to make sure you are logging the right cache. For verification I ask a simple question related to the cache. Was the parking lot a circle or square shape?" You know something obvious and easy, if you had actually been there.