Introduction
The decision in Diamond Trust Bank Kenya Limited v Mutubia & another [2026] KECA 1001 (KLR) is a significant pronouncement by the Court of Appeal on the effect of lack of jurisdiction on court proceedings and the fate of a counterclaim where the main suit has been struck out for want of jurisdiction. The Court reaffirmed the long-standing principle that proceedings commenced before a court without jurisdiction are a nullity ab initio and cannot sustain subsequent pleadings, including counterclaims.
Facts of the Case
The dispute arose after the 2nd Respondent, Fatma Hassan Hadi, filed a suit in the Environment and Land Court (ELC) seeking to stop Diamond Trust Bank Kenya Limited from selling a property she claimed was her matrimonial home. She argued that her husband had charged the property to secure a loan without her knowledge or spousal consent, contrary to the law governing matrimonial property.
The bank opposed the claim, maintaining that it had obtained valid spousal consent from the registered proprietor’s lawful spouse. It later filed a defence and counterclaim seeking declarations that the charge was lawful and enforceable and that it was entitled to exercise its statutory power of sale.
However, in an earlier appeal, the Court of Appeal had already determined that the ELC lacked jurisdiction to hear the original suit because the matter was essentially a commercial dispute that belonged before the High Court. Consequently, the main suit was struck out.
Following this decision, the Environment and Land Court closed the file. The 1st Respondent successfully applied for review of that closure on grounds that the bank’s counterclaim remained unresolved and ought to proceed independently.
Issue Before the Court
The main issue before the Court of Appeal was whether the bank’s counterclaim could survive after the original suit had been struck out for want of jurisdiction.
Decision of the Court
The Court of Appeal allowed the appeal and held that once the main suit had been struck out for want of jurisdiction, all proceedings arising from it, including the counterclaim, automatically became null and void.
The Court rejected the argument that a counterclaim could continue independently under Order 7 Rule 13 of the Civil Procedure Rules. It clarified that the rule only applies where a suit is stayed, discontinued, or dismissed by a court that properly possesses jurisdiction. It does not apply where the entire suit is incompetent from the beginning due to lack of jurisdiction.
In reaching its decision, the Court relied on the principles established in Owners of the Motor Vessel “Lillian S” v Caltex Oil (Kenya) Ltd on jurisdiction, as well as Macfoy v United Africa Co Ltd, which established that a void act is a nullity and all proceedings founded upon it collapse.
Significance of the Decision
This decision reinforces the principle that jurisdiction is fundamental and cannot be cured by subsequent proceedings or party conduct. It confirms that where a suit is filed before a court lacking jurisdiction, every consequential pleading, including a defence or counterclaim, is rendered invalid.
The judgment is particularly important in banking, land, and civil litigation because it warns litigants to institute proceedings before the proper forum from the outset. It also clarifies that a counterclaim cannot stand independently where the original suit itself was void ab initio.
Conclusion
The Court of Appeal’s decision in Diamond Trust Bank Kenya Limited v Mutubia & another underscores the strict approach Kenyan courts continue to adopt on jurisdictional questions. By holding that the counterclaim could not survive a jurisdictionally defective suit, the Court reaffirmed that jurisdiction is the foundation upon which all judicial proceedings rest. Without it, there is no valid proceeding capable of sustaining any ancillary claim.