Most of the time I can find the number if I'm diligent, they have a Kijiji listing, work phone, coach and their number is listed on the minutes, etc. The one time I really wanted to know who it was and couldn't find it, I simply called. If you are hesitant to call, you could call from a pay phone, work phone, borrow a phone, etc. and see if it goes to voicemail where they have left their name, if they answer (and for reasons unknown to me, you still don't want to say who you are) ask for Don, Don's not there, "oh, I'm sorry, is this 403-350-3555? Yes. My message was a bit garbled, it could have been Dawn, may I ask who I'm speaking too? Frank. Ah, definitely wasn't Frank, sorry for bothering you. Or, just hang up and call again. If you hang up enough, it will eventually go to VM.
Or you could text.
Ex-wife, don't want her to know you're stalking her?
