Scottc32 wrote:If I have their names and addresses, is there any reason I wouldn't want to 'assume' they may be members and request their records? ...If nothing comes back, it would confirm they are not members
I like all the responses before mine in the thread. I wouldn't request a record without a birth date. And if nothing comes back it certainly would not confirm they are not members. First of all, I'm not sure CHQ would allow it, due to privacy concerns and name confusion, and as RussellHltn suggested, bringing in the wrong one can REALLY mess things up in TWO wards- and a ward clerk somewhere is going to be really upset at you, because he can't just "undo" it!
I would, however, based on your location, "assume" that a bunch of those houses do indeed contain members. Some intentionally don't tell you, others may not know/remember a baptism, and some don't really consider themselves a member anymore since they haven't been active for years, or perhaps never really were. As has been suggested, this is the time for friendshipping by neighbors and ward missionaries; Street party dinners, after school "Popsicle parties" or "water wars," Kids carnivals, neighborhood service projects, or neighborhood Christmas traditions...In Utah, sometimes we huddle at the church way too much!
As mfmohlma suggested, Get to know them...out in the neighborhood.