RSA 552:18 Proof of Will During Life.

I. During his or her life, an individual may commence a judicial proceeding to determine the validity of his or her will, subject only to the will's subsequent modification or revocation. For purposes of commencing the proceeding under this section, the individual must be domiciled in this state or own real property located in this state. A person acting as an individual's guardian, conservator, or attorney-in-fact shall not commence the proceeding on behalf of the individual.
II. If the petitioner is domiciled in this state, then the venue for the judicial proceeding shall be in the county where the petitioner has his or her domicile. If the petitioner is not domiciled in this state but owns real property located in this state, then the venue for the judicial proceeding shall