N.H. Rev. Stat. § 264:22
A person may give proof of financial responsibility by delivering to the department a receipt of the state treasurer showing the deposit with him of money in the amount, or securities approved by him of a market value in the amount, required for coverage in a motor vehicle liability policy furnished by the person giving such proof under this chapter. Such securities shall be of a type which may legally be purchased by savings banks or for trust funds. All money or securities so deposited shall be subject to execution to satisfy any judgment mentioned in this chapter but shall not otherwise be subject to attachment or execution. Any interest accrued on deposits in the uninsured motorist fund shall be deposited in the highway fund at the end of each biennium.
RSA 264:22
1937, 161:22. RL 122:21. RSA268:22. 1981, 146:1, eff. Jan. 1, 1982.