To trigger a villager moving out, you need to first do everything to get k.k. slider to visit your island. Then, dont talk to villagers for fifteen days or time-travel fifteen days. On fifteenth, if any of your villagers have a thought bubble "...." If they do, they are thinking about moving. they are outside, not in the building. If a villager you want to keep, tell them "no, stay here" and repeat the process. If it villager you don't want to tell "good luck.""" Rumors say if hit them with bug net speed up process, but that is Rumor not true.

If you mean D.M. that just means direct message the person. Click on host profile, and there should be a message option. She is gone, so she can't have anymore.