I've read this in The Quill of Acceptance and the Book of Admittance on Pottermore, and the answers in: How and when did Hermione find out she's a witch?.

We know that a member of Hogwarts' staff goes and explains to the Muggle-born that they're wizards or witches. But how do they track them? For wizards families they simply send an owl, but for Muggle-borns, how exactly do they find a specific location that a Muggle-born resides.

  • It is indeed a duplicate. I need to find that question. – Baby Yoda Nov 20 '15 at 14:04
  • @CreationEdge im VTC, this is answered a few different times on this site. – Himarm Nov 20 '15 at 16:01