N.H. Rev. Stat. Ann. § 644-A:4

No individual or person shall, without consent, place, locate, or install an electronic device on the person or property of another and obtain location information from such electronic device. No such consent shall be required by the parent, foster parent, or legal guardian of a minor, or by the legal guardian for the subject of his or her guardianship, or for persons under house arrest or probation or parole supervision who are issued ankle bracelets.