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Question on Rules of Golf:

Is it a rule of golf that you MUST make an identifying mark on your golf ball?
--Geoff P.

No. This is simply done so that you can identify your ball so that you don't hit the wrong ball and get penalized in competition. It gets difficult say if you are playing a Taylor Made #1 ball and someone else in your group or in another group on an adjacent fairway is playing the exact same ball. It's easy in that situation to hit the wrong ball and get penalized. To be safe when you are playing in competition, make sure to mark your ball.

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