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"And, though Magical Britain doesn't know it, or won't accept the truth of it, those in senior enough positions of authority within the United Kingdom... muggle Britain... government are well aware of the existence of magical Britain and the rest of the wizarding world," added Harry.

"Pardon?" asked a clearly shocked Matthias while Deece looked back in fear.

"Look. The Wizengamot derives its name from the Witenagemot; which is an Old English word meaning 'Meeting of Wise Men'. They, because there was more than one and up to about a dozen, were councils of the ennobled and important ecclesiastical members of society formed to advise the current kings. They're known to have existed from sometime in the seventh century to the eleventh century.

"In the eleventh century it was replaced by the conquering Norman King, William the First, by the single Curia Regis... King's Council... which then remained until the signing of the Magna Carta in 1215. The Curia Regis then quickly morphed into what became the founding of modern Parliament with its various ministries.

"Now, if there's one thing any organised body that is successful generates a lot of, its paperwork... parchmentwork. You have records of meetings, legislation, notes, minutes, reports, all sorts of things like that. And, as is their wont, such paperwork is rarely destroyed. Such documents form the basis of records in large libraries. Even the Wizengamot and the Ministry of Magic know this and work that way.

"So, even though the Statute made it international law to keep the wizarding world a secret since 1695, there have existed records of the wizarding world, in the muggle world, since as far back as the seventh century. That's over a thousand years of bureaucracy documenting everything. Yes, a great much of that has since been destroyed; but, not the very important stuff. Historians and record keepers of their day would not have stood for it.

"Also, spells and potions, including the Obliviation curse, do not destroy those documents. A great many of them still exist through to today. So, it is not a stretch of the imagination to come to the conclusion that the wizarding world is well known by the muggle world in positions of great authority in muggle government. The chance it is not is so slim as to be considered nigh impossible.

"What the Statute of Secrecy actually manages to accomplish is to keep the average muggle citizen unaware of the wizarding world; not the muggle world as a whole. It would not surprise me, in the slightest, that the United Kingdom has departments within their multitude of bureaucracies that are tasked with monitoring wizarding Britain; nor, that the same could be said for other governments around the world."

http://www.fanfiction.net/s/10766595/20/