N.H. Rev. Stat. Ann. § 459:2

Proof that a person obtaining a divorce from the bonds of matrimony in another jurisdiction was (a) domiciled in this state within 12 months prior to the commencement of the proceeding therefor, and resumed residence in this state within 18 months after the date of his departure therefrom, or (b) at all times after his departure from this state and until his return maintained a place of residence within this state, shall be prima facie evidence that the person was domiciled in this state when the divorce proceeding was commenced.