O'Brien v. AmTrust North America
- Martinez-Olguin
- 3:24-cv-02279
- U.S. District Court · Northern District of California
- 2
In O’Brien v. AmTrust North America, Judge Martinez-Olguin sanctioned counsel $500 and set a settlement-enforcement hearing after plaintiffs missed a filing deadline.
Plaintiffs’ counsel James C. Diefenbach was ordered to pay $500, report the sanction and missed deadlines, file a certification, and comply with additional notice requirements. The plaintiffs and AmTrust North America were affected by the scheduled hearing on the motion to enforce settlement.
What happened
In O’Brien v. AmTrust North America, the court had ordered the plaintiffs to respond by June 30, 2025, to AmTrust North America’s motion to enforce a settlement. The plaintiffs filed no response.
The court said counsel had repeatedly missed deadlines and had not litigated the case diligently. It personally sanctioned plaintiffs’ counsel, James C. Diefenbach, $500 and required him to pay the Clerk by August 1, 2025.
Judge Martinez-Olguin also ordered Diefenbach to report the sanction and missed deadlines to the court’s professional-conduct committee, imposed additional notice requirements for one year, and scheduled the settlement-enforcement motion for a July 17, 2025 hearing. The order did not decide whether the settlement should be enforced.
The detailed version
- O'Brien v. AmTrust North America · No. 3:24-cv-02279
- Martinez-Olguin
- July 2, 2025
Background
The court had ordered Plaintiffs to respond by noon on June 30, 2025, to Defendant AmTrust North America’s motion to enforce settlement. The order warned that failing to respond on time would result in personal sanctions for counsel. No response was filed.
The court also referred to counsel’s earlier conduct, including a delay in joining the bar of the Northern District of California and other failures to submit timely responses to substantive motions.
Sanctions
Relying on Federal Rule of Civil Procedure 16(f), which permits sanctions for violating a scheduling or other pretrial order, and on the court’s inherent authority to control proceedings, the court personally sanctioned Plaintiffs’ counsel, James C. Diefenbach, $500. The court ordered him to pay the amount to the Clerk of the U.S. District Court for the Northern District of California by August 1, 2025.
The court also ordered Diefenbach to self-report the sanction and provide the court’s Standing Committee on Professional Conduct with a copy of the order and a list of all deadlines he missed in the case by August 1, 2025. Within 10 business days after that report, he must file a certification stating that he reported as required. For one year, if he practices before the Northern District of California, he must file a notice within 14 days of appearing in any matter, attaching this order and the list of missed deadlines.
Settlement Motion and Hearing
The court set AmTrust North America’s motion to enforce settlement for a Zoom hearing on July 17, 2025, at 11:00 a.m. The court would vacate the hearing if the parties filed a stipulation of dismissal by noon on July 16, 2025. The order warned that Diefenbach would face further personal sanctions if he failed to appear.
The opinion does not decide the motion to enforce settlement. It issues sanctions and sets a hearing.
Read the full 2-page opinion on CourtListener, the free public archive maintained by the Free Law Project.