N.H. Rev. Stat. Ann. § 281-A:40

An employer or the employer's insurance carrier shall make payment of compensation in the amount and manner provided by this chapter. Payment shall be made by direct deposit 6 weeks from the date of disability if the injured worker elects this payment method. The employer or the employer's insurance carrier shall notify the injured worker in writing of his or her right to payment by direct deposit. If no election is made, payment shall be made by paper check mailed to the injured worker. The employer shall file memoranda of payments with the commissioner in accordance with rules adopted by the commissioner under RSA 281-A:60.