LEGAL PRINCIPLE: CONTRACT LAW – Illegality – Distinction Between Void and Illegal Contracts
PRINCIPLE STATEMENT
Contracts which are prohibited by statute or at common law, coupled with provisions for sanction (such as fine or imprisonment) in the event of its contravention are said to be illegal. If the provisions of the law require certain formalities to be performed as conditions precedent for the validity of the transaction, without however imposing any penalty for non-compliance, the result of failure to comply with the formalities merely renders the transaction void, but if a penalty is imposed, the transaction is not only void but illegal unless the circumstances are such that the provisions of the statute stipulate otherwise.
RATIO DECIDENDI (SOURCE)
Per Achike, JSC, in Pan Bisbilder Nigeria Ltd. v. First Bank of Nigeria Ltd. (2000) NLC-1141991(SC) at pp. 4–5; Paras A–B.
"Contracts which are prohibited by statute or at common law, coupled with provisions for sanction (such as fine or imprisonment) in the event of its contravention are said to be illegal. If the provisions of the law require certain formalities to be performed as conditions precedent for the validity of the transaction, without however imposing any penalty for non-compliance, the result of failure to comply with the formalities merely renders the transaction void, but if a penalty is imposed, the transaction is not only void but illegal unless the circumstances are such that the provisions of the statute stipulate otherwise."
EXPLANATION / SCOPE
A contract is illegal if prohibited by statute with penal sanctions (fine or imprisonment). Failure to comply with formalities without penalty renders the contract void but not illegal. The distinction matters: illegal contracts are unenforceable and parties cannot recover; void contracts may allow recovery in some circumstances. The presence of penal sanctions indicates legislative intent to prohibit the conduct entirely. No penalty suggests the legislature only intends to regulate, not prohibit. Courts must examine the statutory scheme to determine whether illegality or mere voidness applies. This guides enforceability and restitution.