Yes: Harry Potter
Dear Mr Potter,
We have received intelligence that you performed the Patronus Charm at
twenty-three
minutes past nine this evening in a Muggle-inhabited area and in the
presence of a
Muggle.
The severity of this breach of the Decree for the Reasonable
Restriction of Underage
Sorcery has resulted in your expulsion
from Hogwarts School of Witchcraft and Wizardry. Ministry
representatives will be
calling at your place of residence shortly to destroy your wand.
As you have already received an official warning for a previous
offence under Section 13
of the International Confederation of Warlocks' Statute of Secrecy, we
regret to inform
you that your presence is required at a disciplinary hearing at the
Ministry of Magic at 9
a.m. on the twelfth of August.
—Harry Potter and the Order of the Phoenix
In the fifth book, Harry was briefly expelled from Hogwarts, due to having performed the Patronus Charm in front of a Muggle. The expulsion was later reversed pending a hearing.
Following discussions with the Headmaster of Hogwarts School of
Witchcraft and Wizardry, the Ministry has agreed that the question of
your expulsion will also be decided at that time. You should therefore
consider yourself suspended from school pending further enquiries.
—Harry Potter and the Order of the Phoenix
This expulsion, was, however, an instance of the Ministry overstepping its authority:
'The Ministry does not have the power to expel Hogwarts students,
Cornelius, as I reminded you on the night of the second of August,'
said Dumbledore. 'Nor does it have the right to confiscate wands until
charges have been successfully proven....
—Harry Potter and the Order of the Phoenix