some time ago i sent you some quotes of Prahbupada´s regarding this very important question
i have not heard back from you
so since i am here in Chile
i feel i should answer your questions directly
yes, one should get initiated formally or as you say "officially"
Prabhupada did that himself, he himself got "officially initiated"
in one sense it is a formality, but the relationship is not
association with spiritual master is in two ways
physically and by instruction
the association with the spiritual master physically is not there so much
but association by sound, through message, through instruction
that is the real associaltion
Prabhupada himself said that his spiritual master initiated him because he liked to hear from Shreela Bhaktisiddhanta
even sometimes he could not understand what he was saying,
still he liked to hear him speak
i have said this many times in lectures over the years
you know who is your spiritual master because you love to hear from him
spiritual master can be householder, sannyasi, brahmacari... it does not matter
Lord Caitanya instructed Ramananda Raya
that the spiritual master is one who is expert in the science of Krishna consciousness
in order to be expert in that science one has to not only have the knowledge,
but has to "walk the walk" and "talk the talk"
so here is another test of who is bona fide spiritual master
¿is he someone who practices what they preach ?
Lord Caitanya also told Ramananda Raya
that anyone, from any social, material position, can be guru
in Iskcon we have several grihastha-gurus, not just sannyasis
and besides,
you always have me as your guardian angel to protect you at all times
i am acting as shiksha-guru for many people who are initiated by my Godbrothers
so you will always have me in your life, as long as you want me around
be happy in Krishna consciousness and do not let anything disturb your mind
hari bol