2012 New York Consolidated Laws
PTR - Partnership
Article 3 - (20 - 28) RELATIONS OF PARTNERS TO PERSONS DEALING WITH THE PARTNERSHIP.
27 - Partner by estoppel.

 
    §  27.  Partner  by  estoppel.    1. When a person, by words spoken or
  written or by  conduct,  represents  himself,  or  consents  to  another
  representing  him to any one, as a partner in an existing partnership or
  with one or more persons not actual partners, he is liable to  any  such
  person  to whom such representation has been made, who has, on the faith
  of  such  representation,  given  credit  to  the  actual  or   apparent
  partnership,  and if he has made such representation or consented to its
  being made in a public manner he is liable to such person,  whether  the
  representation  has  or has not been made or communicated to such person
  so giving credit by or with the knowledge of the apparent partner making
  the representation or consenting to its being made.
    (a) When a partnership liability results, he is liable  as  though  he
  were an actual member of the partnership.
    (b)  When  no partnership liability results, he is liable jointly with
  the  other  persons,  if  any,  so  consenting  to   the   contract   or
  representation as to incur liability, otherwise separately.
    2.  When  a  person  has  been  thus represented to be a partner in an
  existing partnership, or with one or more persons not  actual  partners,
  he  is an agent of the persons consenting to such representation to bind
  them to the same extent and in the same  manner  as  though  he  were  a
  partner   in   fact,   with   respect  to  persons  who  rely  upon  the
  representation. Where  all  the  members  of  the  existing  partnership
  consent  to the representation, a partnership act or obligation results;
  but in all other cases it is the joint act or obligation of  the  person
  acting and the persons consenting to the representation.