Inspecting cards at the end of the trick

The basic rules for playing to a trick is that you should play a card in turn and then only turn it over once all players have played and not before.

Until your side has played to the next trick, if you have not turned your card face down you can ask to see all the cards involved in that trick.

Until your side has played to the next trick and you have turned your card face down then you may only look at the last card you played. You must not show it to any other player. The purpose of this is to check if you have revoked. If your side has played to the next trick then any revoke that might have happened will have been established and thus cannot be corrected. Similarly with lead out of turn, once both sides have played to the last trick then any lead out of turn has been accepted and cannot be changed.

Under no circumstances should you look at any card played earlier in the hand.

It is considered bad form to lead to the next trick until all cards from the previous trick are turned face down. Confusion can occur over what cards has been played to a trick if cards from a previous trick are still face up.