methods suggested by Watchtower literature.
Methods used:
Get the names and addresses of people in the hospital.
Get names and addresses from Obituary columns.
Get the names and addresses of new mothers.
Get the names and addresses of couples who have just gotten engaged.
Get the names and mailbox numbers from locations where Jehovah's
Witnesses are not allowed to preach. Give that information to the
elderly brothers and sisters to write their letters to.
Get the names and addresses from the phone book.
1956 Watchtower/11/15/pg.688
At one of the Society’s Bethel homes a brother, close to eighty years
old, unable to climb stairs because of heart trouble, sends letters of
comfort together with literature to those whose addresses appear in
the obituary column because of having lost a loved one.
Look for green underlining.
https://www.docdroid.net/s6XkbFr/1956-the-watchtower-688.pdf
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Watchtower 1967/6/1/pg.345
The minister soon found that, since she had made the original call, he
had received a letter from a Witness who obtained his name and address
from the obituary column in the newspaper. Though the man was a
stranger to her, she had written a kind letter explaining the Bible’s
glorious hope of a resurrection.
https://www.docdroid.net/W5puFEJ/1967-the-watchtower-345.pdf
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1970 Kingdom Ministry/Jan/pg.8/par.3
3 Many in the congregation know that this sister has had good success
in witnessing by mail. So they give her names and addresses of
individuals to whom they would like her to write. She writes to
individuals that she and other publishers have met in the hospital.
One brother met a businessman who lived in another part of the
country. This man showed interest in the truth. So the brother gave
his name and address to this sister, who continued to develop the
interest by mail. Some names she gets from the obituary column. Or if
there is information in the local paper about new mothers, or engaged
individuals, she writes them, sharing good news from the Scriptures to
encourage them as they embark upon their new responsibilities. The
overseer has gone into the lobbies of apartment houses where the
publishers cannot get in to witness, and he has copied the names and
apartment numbers off the mailboxes so that this sister can contact
these individuals by mail. Names and addresses have been obtained from
the phone book as well as other sources.
https://www.docdroid.net/Mh8D2d0/1970-km-complete-4.pdf
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1971 Yearbook/pg.248/Portugal/par.2
Can elderly people participate in the ministry? Consider this example:
A sister who is eighty-eight years of age could no longer go from
house to house and manifested concern about how to share regularly in
the service. It was suggested that she use the obituary column in the
newspaper and write letters to bereaved families.
https://www.docdroid.net/TkhX8CE/1971-yearbook-127.pdf
Atlantis!