- "It is your duty to report any suspected Mudblood to the Muggle-Born Commission."
- —The Decree.[src]
The Ministerial Decree Number 188 was a formal authoritative order with the force of law issued by the Ministry of Magic during the Death Eater regime, in 1997. It was presumably issued by the anti-Muggle-born Muggle-Born Registration Commission.
It reaffirmed that the reporting of any Muggle-born wizards was mandatory (previously established, with punishment of imprisonment if violated, in Ministerial Decree Number 184), noting that it was a citizen's "duty" to report suspected Muggle-borns.
- Harry Potter and the Deathly Hallows: Part 1 (Mentioned only)
- Harry Potter Page to Screen: The Complete Filmmaking Journey (Mentioned only)