The team and Mawuli have been banned after fielding ineligible players in the competition.
Aside exiting the competition with immediate effect, the three sides will not compete at the next two editions of Ghana’s celebrated high school basketball competition.
Officials from Ghana’s Education Service handed out the punishments after investigations into claims of fielding unqualified players proved right.
Mfantsipim School filed a protest against Keta after losing 13-16 to the side in the final game of Group A in the preliminary stage.
That loss meant Mfantsipim had crashed out of the competition with Keta progressing to the quarterfinals to play Prempeh College.
Mawuli fielded an unqualified player in their respective games in the male division at the just ended competition.
After losing two straight games, Mawuli had already exited the competition before the ruling was passed in the first half of the final Group D encounter involving the school and Opoku Ware School.
By Yaw Adjei-Mintah
@YawMintYM on Twitter