I had a Walt once who wanted to some float flying in our Cessna. He showed me his 2 month old float rating and a log book with 10 hours of float dual training. It soon became apparent he did not have the faintest clue how to fly a float plane and I cut the flight short after saving our lives for the third time in the first 30 minutes.
Never saw the guy again but I wonder how he actually managed to get the rating added to his license without from what I could see ever actually flying a float plane.....