What Happens If I Forget To Move My Marker Back On The Green?

Moving ball marker on green.

Under Rule 15.3, if your ball-marker on the putting green interferes with the line of another player, you should move it to somewhere where it won’t, either at your own instigation or at the request of that other player.

You'll sometimes be asked to move your ball or ball-marker away from another player's line (Image credit: Kenny Smith)