Was only kidding anyway -I seem to have to clarify that around here
Forgive me if I'm reading into your response incorrectly, but it leads me to believe that you have an old email address that you didn't really use to regularly contact him anyway?
If so, again my advice would be just to nail down a way to contact this guy outside RS the next chance you get - & to do that your whole leadership needs to be on the ball & understand its vital importance - all you want from them is to politely enquire about an email where he can be contacted as (for example) Naruto 1001 has some clan matters that only he can address.
Which is exactly the truth.
But your goal is a contact, then you can handle it correctly.
That your clan owner doesn't meet reqs - I guess you didn't glean from my use of it how ridiculous that is.
The Clan Owner always meets the reqs.
It bugs me that you don't get that.
From the sound of it, as soon as someone else is owner, he will be removed from the clan regardless of if he wants to stay or not, because he doesn't meet the reqs.
That you would ask this guy to hand over leadership & then kick him - I have nothing nice to say about that whatsoever.
A possible solution - He can derank all members except for 1 or 2 or whoever to below deputy admin.
So whichever the owners should be can be dep admin.
He can then derank himself to dep admin, & my understanding is then they all become co-owners.
I'm quietly outraged that not being able to tell anyone who he is is a concern.
Noob9000: "Hey Naruto, who is this Owner guy?"
"Naruto 1001" Hey Noob

I'm glad you asked! This generous soul founded our wonderful clan with X X X & myself, & now he puts his life on the line in the real world, defending his country! - I couldn't ask for a better bloke to co-found this clan with"
Noob9000: "Wow great story! Glad he was part of it & I wish him all the luck in the world out there!"