An unregistered registrable instrument, sought to be tendered for the purpose of proving or establishing title to land or interest in land, would be inadmissible under Section 15 of the Land Instruments Registration Law; if it is however tendered to show that there was a transaction between the lessor and the lessee, it will be admissible as a purchase receipt. It will also be admissible if it is meant to establish a fact which one or both parties have pleaded. Under these two conditions, such a document does not qualify as an instrument as defined in the Land Instruments Registration Law.
– Nweze JSC. Abdullahi v. Adetutu (2019)