516:1 Summons.
A summons or subpoena not executed under seal shall be as effectual as though sealed. Writs of summons to witnesses shall be substantially in the form following:
THE STATE OF NEW HAMPSHIRE
__________ ss. To__________:
   
You are required to appear at __________, in the county of __________, on the __________ day of __________, to testify what you know relating to __________, then and there to be heard, in which __________ is __________ and __________ is __________.
   
Hereof fail not, as you will answer your default under the penalties prescribed by law.
   
Dated at ___, the ___ day of ___, ___.