Cause and origin are the subject matters of business.
Causa publica vicarium non recipit.
A public cause does not admit of a substitute.
Causa vaga et incerta, non est causa rationabilis.
A vague and uncertain cause is not a reasonable cause.
Cautionis in re plus est quam in persona.
There is more security in the thing than in a person.
Caveat emptor; caveat venditor.
Let the purchaser beware—let the seller beware.
Caveat emptor; qui ignorare non debuit quod jus alienum emit.