N.H. Rev. Stat. Ann. § 262:3-a

Any person who repossesses a motor vehicle, as defined in RSA 259:87-a, shall notify, within 2 hours after the repossession, a police officer of the town or city where the act of repossession occurred of the fact of the repossession and the name, address and telephone number of the owner and lienholder. If no police officer is available to receive the notification, then notification shall be given to the sheriff's department of the county where the act of repossession occurred. The police department or sheriff shall keep a record of such notification for 30 days after the notification.