What is the oldest written source in this country that mentions this right?

Madagascar

Article 13(1) governs privacy rights in Madagascar. It assures each individual “the inviolability of their person, their domicile and of the secrecy of their correspondence” (Constitute Project, “Madagascar 2010”).

https://www.constituteproject.org/constitution/Madagascar_2010?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 2010 · Last edited 2022-12-28 · Edit on GitHub