Ratio Decidendi

Per Iguh, JSC, in Alao v. African Continental Bank Ltd (2000) NLC-141995(SC) at p. 48; Paras. C–E:

"A misdirection or error in law which is apparent on the face of a judgment must be distinguished from an accidental slip or clerical mistake in a judgment. Whereas the former is appealable and cannot be remedied under the 'slip rule', the latter may, in appropriate cases, be corrected under this rule."

Explanation / Scope

Critical distinction between substantive errors and clerical mistakes: Misdirection/error in law: Wrong legal principles applied, incorrect legal reasoning, misstatement of law or fact. These are: substantive errors, must be appealed (within time limits), cannot be corrected under slip rule, and become final if not appealed. Accidental slip/clerical mistake: Typographical errors, arithmetic mistakes, obvious transcription errors. These: may be corrected under slip rule, don’t require appeal, and can be fixed after judgment delivery. “Slip rule” permits: correcting clerical errors, arithmetic mistakes, and accidental slips—NOT substantive legal errors. This serves: distinguishing ministerial mistakes (correctable) from substantive errors (requiring appeal), preventing slip rule misuse to correct substantive errors, and maintaining finality while allowing obvious mistake correction. Examples: Correctable: wrong date typed, arithmetic error in damages calculation, name misspelled. Not correctable: wrong legal principle applied, misapplication of law, incorrect finding of fact. Parties cannot: use slip rule to correct legal errors, transform appeals into slip rule applications, or avoid appeal time limits through slip rule. This principle prevents: circumventing finality through slip rule, avoiding appeal limitations, and using slip rule for substantive changes while permitting genuine clerical correction.

Cases Applying This Principle