"The player is responsible for playing the correct golf ball. Every player should mark his ball."²
To ensure that you can identify your golf ball at all times, the official rules of golf of the DGV allow golf balls to be marked with a pen. There are no limits to the imagination. Any motif on the golf ball is permitted. Of course, the marking of golf balls is not a requirement of the Rules of Golf and it is sufficient to be able to distinguish the golf balls by brand and number, but it is nevertheless not only recommended for good golfers to mark the golf ball.
Status: 2018