A spokesman for Madonna has previously said that Malawi's President has a "grudge" after her sister Anjimile Oponyo was sacked as the head of her charitable foundation Raising Malawi.
Ms Oponyo was sacked due to "concerns about mismanagement of $3.8m", said Trevor Neilson, whose Global Philanthropy Group manages Madonna's projects in Malawi.
The allegations have been denied by Ms Oponyo and the President Joyce Banda's office has dismissed the claim.
More top news
All eyes are on the stars as they arrive on the red carpet for the 89th Oscars. But who won in the fashion stakes?
Tributes have been paid to the Labour MP for Manchester Gorton and Father of The House of Commons who has died aged 86.
A very unsettled start to the new week with heavy, thundery, occasionally wintry showers spreading in from the west throughout the day.