I was just thinking while re-reading this Thread, that it may be possible at first , even though you have a notarised letter, to not reveal this, but to use their own definition of what constitutes a " Member" ?
I seem to remember that if someone had not been in F.S or attended a Meeting for a good number of years, the org did not consider them to be "one of Jehovah's Witnesses" ?? if this is in Print (?), surely, if you fit the criteria, they cannot take any Ecclesiastical action against you ?