ive worked territory in many cong.s and ive never kept records between sign-outs except for DNC - and ive heard of very few cases where a cong does. sometimes, if theres a need for phone territory (ie shut-in publishers) and none readily available (locked apts) then old NHs might be kept. also, a very few elders/servants feel that our ministry would be more effective if we start out in the territory with some idea of what happened on previous workings rather than starting on a blank page every time. but generally the increased paper-work involved in any case is too prohibitive unless there is some special need. i think the more common case is a lack of good records due to neglect or incompetence.
mox