Both players mark their own score card and also mark their markers score in the markers column.
Cards to be placed in box just inside the locker room entrance. The cards wont be check/touched or verified for at least 72 hours after the comp is finished .
Conversely, reminds of our club pro who was playing in a pro event at Turnberry. He didn't spot that his marker had put his back nine score of 36 against the 18th hole. - so ended up signing for a score of 105. (Dropped him from a money place to second last).