CALIFORNIA FAMILY LAW
...Unmarried Cohabitors
......Agreements Between Cohabitors
.........Legal Theories
............Partnership/Joint Venture/Pooling Agmt
2 Cards On This Topic:

Partnerships or joint ventures between unmarried cohabitors are enforceable, except to extent explicitly founded on consideration of meretricious sexual services.

In proceeding alleging existence of oral partnership, clear and convincing evidence required to overcome presumption of title, notwithstanding confidential relationship between parties.