Giri – Juan is absolutely correct, and as you don’t reside near your Strata Manager may I suggest as you’re a new Owner, at the time of your purchase your Solicitor / Conveyancer would have obtained a Certificate under S109 of the Strata Schemes Management Act 1996 (in NSW), and that would include the names and contact details of all (then) Executive Committee Members.
If you don’t have that Certificate, your Solicitor / Conveyancer would have a copy on file.
Alternatively, bite the bullet and write to the Secretary via your Strata Manager OR perhaps place that letter in an envelope marked “Personal – Secretary SP *****”, and send that by mail in another envelope to the Strata Manager together with a note requesting he/she to pass it on.
Good luck!!