Originally Posted by detroitjunkie
The rule states that whoever was the last aggressor on the river MUST show first if players hesitate or have issues. However, it is any players right, who was in the hand at showdown, to ask to see a players cards...watch out though - some card rooms will declare these hands live, so if it beats you - even if mucked - you will lose the pot
All rules I mention are rules regarding --->Poker Tournaments, they may or may not apply to cash games depending on where you are. ("House Rules" rule in cash games and in regards to cash games vary widely from room to room)
If a player was in the hand at showdown but mucked their own hand face down they have no right to see the hand. (See below TDA year 2015 rule 17)
The rule regarding showing of mucked hands was very lenient in 2009. In 2011 the TDA changed the rule to Tournament Directors discretion with no rights mentioned for anyone still in hand at showdown (Which I thought was sufficient because I assumed anyone in the position of TD would know the rights of individual players at showdown... I was wrong, unfortunately Tournament directors seem to have no clue without clearly defined specific rules) In 2013 The rule was changed to read like the part A: below and in 2015 part B: was added.
2015 TDA rule 17: Asking to See a Hand
A: Players not still in possession of cards at showdown, or who have mucked their cards face down
without tabling, lose any rights or privileges to ask to see any hand.
B: If there was a river bet, any caller has an inalienable right to see the last aggressor’s hand
on request (“the hand he paid to see”) provided the caller retains or has tabled his cards.
TDs discretion governs all other requests such as to see the hand of another caller, or if
there was no river bet. See Illustration Addendum [adopted 2013].
I will note that last year the Beau Rivage in Biloxi, MS was still announcing before every tournament that the 2009 TDA rules apply to their tournaments even though at that time the 2015 rules were being worked out and for some reason they never adopted the 2011 or 2013 rules. In my travels far and wide to Poker Rooms in many different states in the USA most follow the latest edition of the TDA rules with some modification for house rules that must be followed and can not be disregarded even in tournaments.
("House Rules" may be in place because of specific state laws or previous issues legal or otherwise and are not usually arbitrary but sometimes are.)