I'm one who has "faded" over about 7 years and apart from casual relationships which have lingered, and have never had any "official" treatment of my departure. I recognise the need for "closure" or some kind of "status acknowledgement", but with the passage of time see such as nothing more than a legacy to the mind-set of being a JW . . . still playing by thier rules if you like.
My current feeling is that your change of status is your business . . . let it remain a mystery to them . . . while that remains the case you will not be restricted by or feel the effects of that twisted way of thinking . . . allows you more freedom to be accessible . . . and that can be an advantage when others find themselves in a similar position . . . all the very best to you.