Lex loci domicilii means the law of the place of domicile. It is the law of the place of a party’s dwelling house. Lex loci domicilii is applied in case related to will, marriage, divorce, separation and contract.
In In re Harwood, 104 Misc. 653 (N.Y. Misc. 1918), the court held that the validity of a last will is governed entirely and solely by the lex loci domicilii of the testator. When it is sufficient at his/her domicile at the time of death, such will is valid in every other country in which the testator's movable property is situated.