Section 81. Certificate to be filed

Whenever a partnership or business
  name continues to be used as provided by section eighty, the  person  or
  persons  using  such  name  shall  sign  and  acknowledge  or swear to a
  certificate, declaring the person or persons  intending  to  deal  under
  such  name, with their respective places of residence, and file the same
  in the clerk's office  of  the  county  where  the  principal  place  of
  business  is  located,  and  cause  a  copy  of  such  certificate to be
  published once in each week for four consecutive weeks in a newspaper of
  the city or town in which such principal place of business  is  located,
  or  if  none be published in such city or town, in the newspaper nearest
  thereto. A county clerk with whom any such certificate is  filed,  shall
  keep a register in which shall be entered in alphabetical order the name
  of  every  such  partnership and of the partners thereof, and every such
  business name of a deceased person and the names of  the  person  filing
  certificates therefor.