Maud Spellbody receives her Hogwarts letter as expected. Mildred Hubble, on the other hand, does not, and not because Mugglborn have their letters handled differently. Meeting a Black on the train before getting sorted is also unexpected for Maud Spellbody. Disclaimer - I don't own Harry Potter or Worst Witch. (I'm using the newest live action adaption for Worst Witch for inspiration.)