1. The Proper County Depends on Residence and Disputed Events
Under CPLR § 503, venue generally lies where a party resided when the action began or where substantial disputed events occurred. Contract terms or other statutes may change the result; venue is distinct from personal jurisdiction.
Corporate Residence and Contractual Forum Terms
For venue, a domestic or authorized foreign corporation generally resides in the county of its principal office. Disputed events may justify another county. Review corporate records, agreements, and party locations. A partnership dispute may also involve an arbitration clause that changes where the parties must proceed.
Nassau and Suffolk Filing Locations
Both counties handle commercial civil claims in Supreme Court, but their filing practices differ.
| Filing Detail | Nassau County | Suffolk County |
|---|---|---|
| Supreme Court | 100 Supreme Court Drive, Mineola | 1 Court Street, Riverhead |
| Commercial Division threshold | $200,000 | $100,000 |
| E-filing | Generally mandatory for new Supreme Court cases | Mandatory for Commercial Division cases |
Supreme Court
- Nassau County100 Supreme Court Drive, Mineola
- Suffolk County1 Court Street, Riverhead
Commercial Division threshold
- Nassau County$200,000
- Suffolk County$100,000
E-filing
- Nassau CountyGenerally mandatory for new Supreme Court cases
- Suffolk CountyMandatory for Commercial Division cases
Nassau generally requires NYSCEF commencement for new Supreme Court cases filed since July 7, 2025. Unrepresented litigants are exempt. In Suffolk, check the applicable case-type protocol before filing outside the Commercial Division.
2. Commercial Division Assignment Requires Eligibility and Timing
A business-related fiduciary duty claim may qualify for the Supreme Court's Commercial Division under 22 NYCRR § 202.70. Assignment requires qualifying subject matter, sufficient value unless exempt, and a timely request. Its threshold is not a minimum for an ordinary Supreme Court action.
Monetary Thresholds and Important Exceptions
The county thresholds appear above. They exclude punitive damages, interest, costs, disbursements, and counsel fees. For equitable or declaratory relief, the court measures the value of the benefit sought, right protected, or injury avoided. Shareholder derivative actions and qualifying business dissolution proceedings are among the exceptions to ordinary dollar thresholds. Claims outside the Commercial Division can proceed in another appropriate court part.
The RJI and 90-Day Assignment Window
A party ordinarily requests assignment by filing a Request for Judicial Intervention (RJI) and Commercial Division Addendum within 90 days after service of the complaint. The addendum states the grounds for eligibility. Rule 202.70 permits transfers for good cause after that window, but they are not automatic. Under Commercial Division Rule 7, a preliminary conference generally occurs within 45 days after assignment or as soon as practicable, subject to special scheduling when the RJI accompanies a dispositive motion.
3. Filing, Service, and Electronic Submission Are Separate Steps
Under CPLR § 304, a civil action ordinarily begins by filing a summons and complaint or summons with notice. The County Clerk issues an index number after filing and payment. Electronic submission through NYSCEF does not itself establish that the defendant received legally valid service.
Initial Papers and Filing Fees
The ordinary Supreme Court index-number fee is $210; an RJI ordinarily costs $95, subject to exceptions or waivers. The complaint should explain the fiduciary relationship, disputed conduct, and resulting injury. CPLR 3016(b) requires detailed allegations for specified wrongdoing, including breach of trust. General accusations without supporting facts risk dismissal. Check the court's confidentiality rules before submitting private financial documents.
Service Deadlines and Proof
CPLR § 306-b generally requires service within 120 days after commencement, subject to exceptions or a court-ordered extension. Mandatory e-filing does not ordinarily replace service of the initiating papers under the CPLR. Keep valid proof of service. The defendant's response deadline depends on how and when service occurred and which papers were served, rather than the NYSCEF filing date alone.
4. The Proper Claimant and Records Determine the Pleading
Identify who suffered the injury. A loss to the business does not necessarily give an owner an individual claim. The complaint must link duty, conduct, and injury, considering governing agreements and formation law.
Individual Claims and Derivative Actions
Business Corporation Law § 626 sets ownership and board-demand pleading requirements for corporate derivative actions. In Tzolis v. Wolff (2008), the New York Court of Appeals recognized derivative suits by LLC members. A derivative recovery generally belongs to the entity. Owners should resolve this distinction before filing a shareholder derivative lawsuit.
Evidence Linking Conduct to Financial Loss
Business Corporation Law § 717 and Limited Liability Company Law § 409 state relevant duties for directors and LLC managers, respectively. Collect operating agreements, minutes, statements, related-party records, and communications. Each should establish authority, a disputed act, or resulting harm. A taxpayer's routine relationship with an accountant does not automatically establish a fiduciary relationship; contract and professional-negligence theories require separate analysis. Preserve evidence lawfully without altering files or entering restricted accounts.
5. Limitation Periods and Court Jurisdiction Need Separate Review
The filing deadline depends on the substance of the claim and the relief requested. No single period covers every fiduciary claim. An “equitable” label or unsupported fraud allegation does not extend time.
The Three-Year Rule and Possible Six-Year Claims
A fiduciary claim seeking only money damages and not based on fraud generally falls under CPLR § 214(4)'s three-year period. Some other claims may fall under CPLR § 213's six-year provisions. In Breslin Brookhaven, LLC v. Rose (Second Department, 2026), the court dismissed part of a damages-only fiduciary claim as untimely and found other damages allegations insufficient. A separate contract claim survived the dismissal motion. Identify each alleged act, accrual date, and loss before calculating a deadline.
Federal Court and Final Filing Decisions
The Eastern District of New York includes Nassau and Suffolk, but a state-law dispute needs an independent federal jurisdictional basis, such as diversity of citizenship. Before filing, confirm the proper plaintiff, county, governing agreement, deadline, Commercial Division eligibility, and service plan. If assets face imminent dissipation, evaluate whether facts support provisional relief. For the underlying legal elements and remedies, see breach of fiduciary duty.
21 Oct, 2026
