N.H. Rev. Stat. Ann. § 301-A:18

The holdings of any member of an association to the extent of a minimum amount necessary for membership, but not to exceed $100, shall be exempt from attachment, execution, or garnishment for the debts of the owner. If any holdings in excess of this amount are subjected to such liability, the directors of the association may either admit the purchaser thereof to membership or may purchase such holdings from him at par value.