This brings us to the subject of the equitable doctrine of “Notice.” It is usually said that a purchaser of the legal estate in any property for value and without notice has an “absolute, unqualified and unanswerable defence” to any claim of a prior equitable owner or person having a prior equitable interest in the same property (see Pilcher Vs Rawlings (1872) 7 Ch. App. 259 at 269 per James L.J.). Where, however, the purchaser, as here, has notice of a prior equitable mortgage in the property in which he seeks to take a legal estate he has a duty, by himself or by his vendor, to get rid of that prior equitable interest otherwise he is taking unnecessary risk.
– Idigbe JSC. Ogundiani v. Araba (1978)