Now, equitable mortgages are created inter alia, (1) by mere deposit of title deeds with a clear intention that the deed should be taken or retained as security for the loan; (2) by an agreement to create a legal mortgage and (3) by mere equitable Charge of the mortgagor’s property. In passing we think that it should be pointed out that the last of the three classes of equitable mortgage i.e. that which is created merely by a charge on the property intended as security for the loan differs considerably from the first two in respect of the remedies it confers; and the property so charged is appropriated only to the discharge of a debt or some other burden in respect of which the property stands charged.
– Idigbe JSC. Ogundiani v. Araba (1978)