This one is too awesome to miss.
You’re welcome.
The Tooth Fairy has a ZIP Code?
Fake.
They weren’t even consistent with their fake handwriting.
And for further botchery of the fakeness, they screwed up the dates in the picture w/ the stamp.
The stamp has a sticker that says 1980 on it, yet it’s a 5 cent stamp and appears to be sufficient postage to mail a letter. Well the rate to mail a letter hasn’t been 5 cents since 1967. On top of that, even if it were really sent somehow in 1980, the “daughter” would have likely turned 31 years ago, as the original message claims (which was posted just last month, although we don’t know when they are claiming it was originally sent. But if it was sent recently, then the “daughter” would have been less than a year old when the letters were allegedly written).
All of that is debated in the comments on the article. The consensus is pretty much that there were some old Grenada stamps lying in a drawer that the kid was allowed to use for “play” letters.
Uh, I don’t think that letter was ever actually “sent” at all. Think about it.
I agree, the thing seems kind of fakey, but not for this reason. It’s supposed to be a kid, and this is the period in her education where she’d be spending a lot of time drilling on hand writing. I’d expect her writing to change dramatically over the few year span during which she’d losing her baby teeth.
Either way, the writing style alone is enough to make it look fake. 
ETA: as in, the word choice rather than the handwriting. It just doesn’t sound like something a little kid would actually write.
nm
Man, you guys are no fun.
It’s amusing on face value.
But yeah, I’m a little taken out of the moment by the clear fakeness of it all.