There was a thread about this not too long ago. Here was my idea:
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Here's an idea for resignation:
What could they do if during a TMS assignment or service meeting part you took 30 seconds and made the following announcement yourself:
"I'd like to take a brief moment to inform the congregation that I have decided to discontinue serving as an/a [elder|ministerial servant] due to matters of principle and personal issues. I look forward to continuing to serve God alongside you as friends."
Make no mention to any of the body that you were planning to make this announcement, so everyone is equally surprised. Then simply cease to attend elder's meetings. When pressed by the other elders for reasons, refuse to give them and kindly mention that the reasons were private and that the elders were no more entitled to them than the members of the congregation. How good would that be?
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You can check out the rest of the thread here:
http://www.jehovahs-witness.com/forum/thread.asp?id=26303&site=3&page=1