Wouldn't just writing a statement with a date and having it notarized, or just signed by two witnesses, (NOT JW's) and keep the document for yourself be about the same? For some of us after making the mental decision to leave we have only a few other acquaintances.
I have heard several experiences of family's being out for 15 years and someone stirs up a drama storm and the elders are writing letters requiring a signature and a formal response from the individual family members. The family's response was they wrote letters and they also mentioned how petty the elders were to pursue someone that has had no association for 15 or more years.
The family also mentioned the mental and emotional "pain and suffering" created by the Local Congregation and said that if the elder's bothered them in any other way, pursued them, stalked them, or if an announcement was made concerning them they would sue the three elders personally and then the congregation. The congregations' pursuit was dropped immediately, but the "elders" defended themselves and made the assertion that the pursued family was causing the trouble, saying, they said they would get lawyers and so and such.