If a player is sent off (red card), he/she cannot play in their next game.

Question 1: if the referee does not include the send-off in the game report, or does not submit a game report, is the player still required to not play in their next game?

Question 2: It is VERY common for referees NOT to tell a youth player why (unsporting behavior, dissent, serious foul play, etc) a card is being displayed. When asked by the player or coach, the VERY common response is ‘I don’t have to tell you’. How are youth players to learn from a mistake when there is absolutely no reason given by the ‘professional offical’ as to what the mistake was? Are game reports accessible to coaches, players, and/or parents?

USSF answer (February 28, 2012):
1. Referees are expected to submit their match reports as quickly as possible, usually within 2-3 days of the game. If they do not do so, then technically the events described (or NOT described) therein did not occur — but see below.

Technicalities aside, realistically the game occurred: people were there; witnesses can be subpoenaed; the referee could be reminded of his report; the player who was red carded should, on his own initiative or by direction of his coach, sit out his team’s next regularly-scheduled match. All this should occur even without the actual filing of the referee’s report. An opposing coach could certainly note at the team’s next regularly-scheduled game that Player X should be sitting out and, if this is disputed on any basis (including the lack of a report from the referee), a complaint could be filed which would eventually trigger a demand upon the referee to get the requiredreport in. In real life, there are literally thousands of games that occur with no formal referee report going into a league or association office — of course, in most of these, nothing untoward has occurred, but no one has any problem accepting that there was a game, there was a score, and Team B won.

2. The referee is REQUIRED to tell a player that he or he has been cautioned or sent off for one of the seven reasons for either sort of misconduct.

They cannot refuse to tell this to the player and should be reported to refereeing authorities if they do so refuse. They are NOT required to tell the coach anything. In most states (we cannot speak for all of them) the reports are not available to non-refereeing or competition officials, but appropriate parties can be told of the contents regarding a specific person or incident.