as of 6/18/2026 6:49:19 AM

Oscar Posterli

Law Offices of Oscar Posterli
33 N. County St., Suite 308
Waukegan, Illinois 60085-4319

(847) 263-1500

oscar@posterlilaw.com

Date Admitted

May 13, 1988

Illinois Registration Status

Active and authorized to practice law

Malpractice Insurance

In annual registration, the attorney reported that the attorney, or the attorney’s firm, does not maintain malpractice insurance. (Some attorneys, such as judges, government lawyers, and in-house corporate lawyers, may not carry coverage due to the nature of their practice setting.)

Public Record of Discipline and Pending Proceedings
Case(s) below are identified by caption and Commission case number. If there is more than one case, the cases are listed from most recent to oldest. A case may have more than one disposition or more than one component to a disposition, in which case each disposition and component is also listed separately within that case record, again in an order from most recent to oldest.

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Case Research
to access any documents regarding this lawyer that are in our database. Case Research contains most disciplinary opinions of the Supreme Court and most disciplinary orders and board reports issued since 1990. If Case Research does not contain the information you are seeking, please contact the Commission's Clerk's Office for assistance. Contact information for the Clerk's office is available under Clerk's Office Services.

In re Posterli, Oscar , 89CH0520
Disposition Suspension for a specified period
Effective Date of Disposition 05/24/1991
End Date of Disposition 11/24/1991
Definition of Disposition Suspension for a specified period reflects a determination that the lawyer has engaged in misconduct and that the misconduct warrants an interruption of the lawyer's authority to practice law during the suspension period, which is a fixed period of time identified in the Supreme Court's order. The lawyer is not authorized to practice law during the period of the suspension.
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