Ball marker stuck to finger after marking ball
Rule 20-1 says
If a ball or ball-marker is accidentally moved in the process of lifting the ball under a Rule or marking its position, the ball or ball-marker must be replaced. There is no penalty, provided the movement of the ball or ball-marker is directly attributable to the specific act of marking the position of or lifting the ball. Otherwise, the player incurs a penalty of one stroke under this Rule or Rule 18-2a.
Decision 20-1/6 Ball-Marker Moved Accidentally by Player in Process of Marking Position of Ball says
Q. A player marked the position of his ball with a coin, lifted the ball and pressed down the coin with the sole of his putter. He walked to the edge of the green and then noticed that the coin had stuck to the sole of the putter. What is the ruling?
A. In this case, the movement of the ball-marker was directly attributable to the specific act of marking the position of the ball.
Accordingly, no penalty is incurred and the ball or the ballmarker must be replaced. If the spot where the ball or the ballmarker lay is not known, it must be placed as near as possible to where it lay but not nearer the hole (Rule 20-3c).
And Decision 20-1/12Ball-Marker Moved Accidentally by Player After Having Moved Loose Impediments says
Q. A player marked the position of his ball on the putting green with a coin and lifted the ball. He then placed his finger on the coin, while he brushed aside some loose impediments so that he did not move the coin. On lifting his finger the coin initially stuck to his finger before falling to the ground and coming to rest in a different position. What is the ruling?
A. The act of placing the finger on the coin is considered to be an extension of the marking process (see Decision 20-1/6). Therefore, as the movement of the coin was directly attributable to the specific act of marking the position of the ball, the player incurs no penalty and the ball or ball-marker must be replaced (Rule 20-1).
So I'd say from what you have said so far, no penalty.
I was interested in the second decision as I would have thought that act was separate from the act of marking the ball. In fact it wasn't strictly necessary because Rule 23-1 says that
On the putting green, if the ball or ball-marker is accidentally moved in the process of the player removing a loose impediment, the ball or ball-marker must be replaced. There is no penalty, provided the movement of the ball or ball-marker is directly attributable to the removal of the loose impediment. Otherwise, if the player causes the ball to move, he incurs a penalty of one stroke under Rule 18-2a.
But probabaly best not to have to worry about having to replace the marker if it had been moved.
