A college who claims to have 12 National Championships, but really only have 4 outright championships. (1961, 1965, 1979, 1992)
Alabama Crimson Tide
Their 1925 and 1926 "Championships" were "awarded" by a poll that didn't exist until 1941.
Their 1930 "Championship" was awarded by a different poll that didn't exist until 3 years later.
In 1934, they finished 6th in the official poll, but they claim this a National Championship year since some random guy named Dunkel came up with his own system.
In 1941, they finished 20th in the official poll and 3rd in the SEC, but Football Thesaurus awarded them the National Championship when it came into existence 5 years later.
In 1964, given a split National Championship with Arkansas before any bowl games were played. They lost. Arkansas won.
In 1973, UPI gives Alabama National Championship before the bowl games. The AP gives Notre Dame National Championship after they defeat Alabama in the Sugar Bowl.
In 1978, Alabama claims a split National Title with USC. Alabama only lost 1 game that year. The problem is that it was to USC.