DIM:
I 'faded away' about 4 years ago. According to the Soceity's point of view I simply went "poof!"
I told the elders I was moving to another State. Told them I would check out the local congregation on my next trip there prior to the move. Later on I approached the P.O. and Secretary and gave them the name and address of the P.O. and COngregation name of my 'new congregation.'
The name of the congregation was real but i gave them a relative's address. So sure enough my Publisher Record cards and letter of Introduction were sent to my relative, they sent it to me and now no-one is assigned to watch for me. The old Cong washed its hands wiht sending the letter and no new congregation is waiting for me to show up. No elders visiting you, etc.
You cna look up congrgation names in most White Page listing online. I suggest using a real congregation name for the reason that it adds validity if some checking is done.
You can also call the Society's Service Desk. Tell them that you are travelling to Seattle and want to know the closest congregation so you can continue attending meetings. They will usually be happy to give you the P.O.'s name as well which you can add to the info you give to your elders. (I'd also pick a congregation on the opposite end of town from where you will be living.)
I have been the "P.O. of the new congregation" on several occasions and this system still seems to work. I simply forward the sealed envelope to the person wanting to disappear.
Hope this is of some help.
Kismet