Hi Dan, a club will require you to submit a minimum of 6 scorecards per year to maintain your handicap. These they tend to take from you during club competitions because (they think) in a competition there is less possibility of you 'easing off' on the last few holes to protect your handicap (and give you an advantage in a big competition next week...).
However, if you're honestly trying to track your game and your progress (and not trying to give yourself an unfair advantage when playing against others) the more scorecards you submit the more information you have to available to see how you are progressing, see where you're leaking shots, see where you need to focus on imporving and more accurately track your handicap. (it's harder to 'fake' a handicap if you can point to a history of your last 20 or 30 games).
Having said that, the reason it's not compulsory to 'include the game for handicap revision' is that you may feel that you want to record the scorecard as part of your game history but it wasn't representative of your playing standard (pouring rain, temporary greens, hurt your wrist, hung over! etc).
So, in summary, yep record as many games as you can and use most of them to revise your handicap and you'll get more respect from other golfers (and won't get called names when you play out of your socks and score 6 better than your handicap would suggest).
