From the flashback scene near the beginning of Book 6 Chapter 1, where the Muggle PM first meets Cornelius Fudge:
“But then,” bleated the Prime Minister, “why hasn’t a former Prime Minister warned me — ?”
At this, Fudge had actually laughed.
“My dear Prime Minister, are you ever going to tell anybody?”
So it’s implied that no Obliviation is needed. On the other hand, I wouldn’t it past Eliezer to decide that this is not credible in a story for adults. And after all, Fudge never really answered the question.
From the flashback scene near the beginning of Book 6 Chapter 1, where the Muggle PM first meets Cornelius Fudge:
So it’s implied that no Obliviation is needed. On the other hand, I wouldn’t it past Eliezer to decide that this is not credible in a story for adults. And after all, Fudge never really answered the question.
Thanks for the lookup. Yes, that implies that a limited number of muggles thought to be ‘safe’ are permitted to know about the wizarding world.