hitting wrong ball

Question
Hello John,
during a match play game, my partner hit my ball.
what is the penalty?

Answer
Gray:  The penalty for hitting the wrong ball in match play is loss of hole; whether it's your ball or another that was hit.  

You can see this rule and the others at:  http://www.usga.org/Rule-Books/Rules-of-Golf/Rule-15/

Fairways and Greens,

John Brott
www.golfnutts.com