Civil Code · English · 2015 Article 171Unknown Domicile (1)Where it cannot be established where a person has or had his last domicile, the place of his principal residence shall be deemed to be the place of his domicile.#(2)In default of a principal residence, regard shall be had to the secondary residence first established.#(3)In default of residence, regard shall be had to the place where the interested person is.# ← Article 170Article 172 →