2006 TOC
The 2006 TOC was canceled a week before the tournament, when many high school teams had already made travel arrangements. One team didn't know of the cancellation until arriving at Chicago. Some or all of the schools also never recovered their registration fees. Gary Lipshutz, head of ASCN, came under investigation for fraud, however it appears that eventually no legal charges were ever pressed against any individual involved in the scandal.
Lipshutz was quoted in a newspaper article about the missing registration fees as saying that a minimum of 24 teams were needed for a "truly competitive" tournament, but only 14 were registered.