SECTION 1 OF THE CONVEYANCING DEGREE 1973 (NRCD 175)

Section 1—Mode of Transfer.

A transfer of an interest in land shall be by a writing signed by the person making the transfer or by his agent duly authorised in writing, unless relieved against the need for such a writing by the provisions of section 3

This means that in Ghana if the transaction is not in writing a legal interest cannot be said to have been created.