A counter claim to quote from Bairamien, JSC in Oyegbola v. Esso WA (1966) 1 All NLR 170 is a weapon of offence which enables a defendant to enforce a claim against the plaintiff as effectively as in an independent action. The counter-claim must be directly related to the principal claim but not outside of and independent of the subject matter of the claim. – Niki Tobi JSC. Okonkwo v. Cooperative Bank (2003)
WHEN MAIN CLAIM IS GRANTED, ALTERNATIVE CLAIM CANNOT BE GRANTED
When a party as in this case, the Plaintiff/1st Respondent made claims the in alternative, she is saying that she wants either of her reliefs. So any of the claims granted suffices for the purpose of satisfying her claim. When a Court grants the main claim, the alternative claim would no longer be considered. When the main claim fails, the alternative claim must be considered, and if found proved the Court should grant it as the Court of Appeal did in this Appeal.
— O. Rhodes-Vivour, JSC. Bakari v. Ogundipe (2020) – SC.514/2015