26 Jun Abubakar Umar & Anor V National Health Insurance Authority (NHIA) Civil Appeal No. J4/1/2020 Judgment of the Supreme Court dated 24th March, 2021.
Even where it has not been pleaded as a remedy, “the courts have not hesitated in the interest of justice to [reverse] ‘…the unjust enrichment of [a] defendant through its retention of the benefit of [a] plaintiff’s services without any payment for them...