Some professors may refuse to send letters of recommendation to more than a specific number of judges, or may be willing to recommend only a small number of students to each judge. This is their prerogative. A letter of recommendation is a favor, not an entitlement. Those professors who insist on limiting the number of letters they will send usually believe they can write more effectively if their letters are directed personally to the judges involved, and that they cannot give sufficiently strong recommendations for a large number of students applying to the same judge. Their concern is legitimate. If a faculty member should refuse to provide all of the letters you request, consider whether you might be better off readjusting your application strategy (e.g., ask a different faculty member for a recommendation or apply to fewer judges).