sawtooth
Tour Winner
That is correct. England Golf recommend Index, Course AND Playing are shown on card, but Course Handicap looks to be the one relevant to the Rules of Golf.
However, even with CH shown, that doesn't mean some players will not pick up early when they can no longer score a point in the competition. Ultimately they'll know their Playing handicap anyway, so many will naturally pick up early when they shouldn't, so it'll still have to be drummed into them. Arguable, for a player who is all about winning competitions, and is quite happy to have as high a handicap as possible, there is little incentive for them to hole out when they miss their putt for a point, yet still need the next in terms of CH. Granted, this will not happen every round and ultimately unlikely to make any real difference overall, given that this scenario would need to happen on the 1 or 2 holes in which they get shots under CH but not PH.
We print labels and stick them on score cards so we'll most likely add both CH and PH for the player anyway. We are not planning to allow comps with different tee boxes so this shouldn't be too onerous.