On your scoresheet you are required to record the result which 99.99% of the time will be one of 1-0, 0-1, ½-½. In the very rare cases when it is not one of those somebody will almost certainly be appealing the arbiter's / organizer's decision ;-).
You are not required to put how that result was achieved, e.g. flag dropped, resigned, defaulted, draw by 3-fold repetition, draw by 5-fold repetition, draw by 50 move rule, draw by 75 move rule (I actually got to rule that in a junior competition a few weeks ago - a real pain in the backside having to count up to 75 ;-) ), successful draw claim under appendix G in a quickplay finish that my opponent wasn't trying to win, successful draw claim under appendix G in a quickplay finish that my opponent couldn't win by normal means, checkmate, stalemate, etc. Note that I believe some national federations still allow adjudication but FIDE does not.
You get the picture! It would get a bit silly. Of course you are free to record that if you want. Just that not being a requirement there is no "approved" way for doing this.