This used to work in WW but it doesn't in NL. I tried it back when the game first came out because that's how I kept everyone in my WW town, but I still got pinged to move from villagers I had letters for.
I think she means write a letter and have it blue, ready to send before trying to get your next pinger..I would say do it right after someone has left before a new one is chosen as they may have not worked before if you wrote it after they were set to be the next...but I have no confirmation, may try it after Katt leaves and test it by writing it that day as am targeting a specific there next.
Oh wow. That is actually really brilliant! It also makes sense. The game would probably break if someone moved out if you still had a letter addressed to them.
Oh man, I was hoping this would work until I read all the other posters. Thx for sharing still. It's good to get ideas out there only if to test out the truth of them.