In the last 2 lectures, this Latin words were used frequently by the lecturer. It might be useful if I elaborate about it.
This general principle, relevant to the passing of property or title to goods, ‘Nemo Dat Quod Non Habet’, that is a seller cannot pass title if he does not have title. ‘Nemo dat quod non habet’, literally meaning `no one [can] give what one does not have.`
In ownership terms, this means ownership of goods will not pass by sale from the true owner to another unless the true owner is involved, voluntarily and for consideration, in the transfer of the ownership.