I too served as a Secretary for a time....but the WT Conductor for much longer.
Its NOT difficult to fade.
Hell......look up an address for a KH in Chicago and have your cards sent there. The current rules are that they aren't supposed to wait; just send them. They will send the cards to the address......you will never show......they will never follow up with the old congregation (even if they did, the elders won't know what to say).........and (((POOOOOOOFFFF))))) you're gone.
FYI.....I did this myself. Left the congregation, went to one across town, stopped going, the secretary called and I told him I'm attending another congregation, he sent my cards to that KH and I've NEVER attended. They asked my mother about me once and she said "leave him alone".......and (((POOOOOOFFFFFFFF)))) ..........I was gone.
I will admit that they are a bit 'afraid' of me....... I was a "big shot elder" (I know...RIDICULOUS)....so I 'know' a lot of their dirty laundry. They just leave me alone.