Is there a proper way to indicate "stalemate" on your scoresheet? Yesterday, after squandering a win, I played on until stalemate (actually, I offered a draw, but my opponent isn't a native English speaker, so I don't think she understood; in a few more plies we hit stalemate).

I realized I didn't know how to indicate this on my scoresheet and I just wrote "stalemate" in English.

Question: Is there a proper way to indicate "stalemate" on your scoresheet?

For checkmate, I believe it's usual to write #, but I'm not sure for stalemate.
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.