After a round, judges often "call for cards" to examine evidence whose merit was contested during the round or whose weight was emphasized during rebuttals so that they can read the evidence for themselves. Although widespread, this practice is explicitly banned at some tournaments, most notably National Catholic Forensic League nationals, and some judges refuse to call for cards because they believe the practice constitutes "doing work for debaters that should have been done during round". Judges may also call for evidence for the purpose of obtaining its citation information so that they can produce the evidence for their own school. Opponents and spectators are also generally allowed to collect citations in this manner, and some tournaments send scouts to rounds to facilitate the collection of cites for every team at the tournament, information which is sometimes published online.