N.H. Rev. Stat. Ann. § 296:42

Any stockholder who has voluntarily paid a debt or liability of a corporation, after demand for payment thereof, which he was legally holden to pay, may have contribution by a bill in equity against the other stockholders for such sum as he ought equitably to recover; but no director, officer or stockholder who advised or consented to any act in violation of the provisions of this subdivision shall recover against any stockholder who did not advise or consent thereto.