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About Me

Michael Hassen's litigation practice spans 23 years and emphasizes general business and commercial litigation, including class action defense and matters involving intellectual property and unfair competition. His Class Action Defense Blog is updated almost daily, contains more than 2,000 searchable pages and is routinely read by many in the legal community.

Michael has substantial experience representing corporations (particularly financial institutions and manufacturers) and real estate developers, owners and managers. He has significant experience in class actions and unfair business practice representative actions (section 17200), as well as business torts such as misappropriation of trade secrets and raiding of corporate employees, ADA claims, and all phases of commercial and real estate finance, construction finance and construction defect claims.

Michael also has experience representing lenders in all facets of lender litigation, ranging from class actions and unfair business practices based on alleged "predatory" lending and RESPA violations or alleged violations of the Fair Debt Collection Practices Act, to claims alleging elder abuse or challenging the validity or priority of liens.

Michael is experienced in appellate matters, having had primary responsibility for preparing more than 100 appellate briefs, and he is admitted to practice before the United States Supreme Court.


Practice Areas


  1. Class Action: 70%
    26 years
  2. Litigation: 20%
    29 years
  3. Appeals: 10%
    29 years

Attorney Endorsements

5 total 

  • Hovanes Margarian

    I endorse this lawyer.


    Hovanes Margarian Consumer Protection Attorney
    Relationship: Fellow lawyer in community

  • Daniel Aaron Horowitz

    This good looking fellow is a close friend of mine. He is also the finest litigator that I know. He is the lawyer to the lawyers. Enough said ! Daniel Horowitz


    Daniel Horowitz Personal Injury Attorney
    Relationship: Friend

Contact Info

Jeffer Mangels Butler & Mitchell

Two Embarcadero Center
San Francisco, CA, 94111-3823



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
AV RatingMartindale-Hubbell2009
AV RatingMartindale-Hubbell2008
AV RatingMartindale-Hubbell2007
AV RatingMartindale-Hubbell2006
Graduated <i>summa cum laude</i>University of California at Berkeley1983
Work Experience
TitleCompany NameDuration
PartnerJeffer Mangels Butler & Marmaro2005 - Present
ShareholderMiller, Starr & Regalia1991 - 2005
AssociateSonnenschein Nath & Rosenthal1988 - 1991
PrincipalHassen Law Office1987 - 1988
Staff AttorneyCalifornia Supreme Court1986 - 1987
Association NamePosition NameDuration
San Francisco Bar AssociationN/AN/A
Publication NameTitleDate
Class Action Defense BlogSummaries of class action cases published almost daily2009
Class Action Defense BlogSummaries of class action cases published almost daily2008
Class Action Defense BlogSummaries of class action cases published almost daily2007
Class Action Defense BlogSummaries of class action cases published almost daily2006
Miller & Starr, California Real Estate (3d ed.)Chapter 8, “Deeds”2004
Miller & Starr, California Real Estate (3d ed.)Chapter 14, “Adjoining Landowners”2004
Miller & Starr, California Real Estate (3d ed.)Chapter 19, “Landlord and Tenant”2004
Miller & Starr, California Real Estate (3d ed.)Chapter 27, “Construction Contracts”2004
School NameMajorDegreeGraduated
University of California at Berkeley, Boalt Hall School of LawLawJD - Juris Doctor1986
University of California - BerkeleyN/AA.B.,1983
Speaking Engagements
Conference NameTitleDate
Complex LitigationAvoiding Ethical Dilemmas & Questionable Behavior In High-Stakes Complex Litigation2008
Litigating Class Action SuitsElectronic Discovery Issues of Particular Importance in Class Action Litigation2007
Defending Fraud Claims in Consumer Class ActionsViews from the Bench2007
Defending Fraud Claims in Consumer Class ActionsEthical Issues in Settling Class Actions2007
Defending Consumer Protection Class ActionsClosing Down The Case2007
2007 Class Action Litigation ConferenceSettling Class Actions from A to Z2007