I hate that so much. I wish they had a different set of text that differentiate between holidays and villagers moving. Like maybe she could say, "Mayor, I have some sad news for you today. So-and-so is leaving. You'd better go say goodbye." Or just something different.
It's always them just sending me a normal letter. I'm like, Don't send me a ltter after i've just visited the Tardis, honestly you scare me too much! Or sometimes it's just the bank telling me that i have money.