Ditch Your Current Nassau County Property Tax Service
Use this process to help cancel your current property tax grievance service or firm in Nassau County.
Wanting to cancel Ownwell? Visit here.
In Nassau County, a property tax grievance covers only one tax year, so you must authorize a representative each year. Last year's authorization does not carry into the new roll. Because the right to file resets annually, you can change representatives or file yourself for the new assessment.
Warning: Do Not Sign Duplicate Authorizations
- If two representatives hold active authorizations for the same property and tax year and the conflict isn't resolved, the Assessment Review Commission (ARC) denies the application outright.
- A denied grievance means no reduction that year.
What You Will Need to Cancel
- Service address (include unit or suite if applicable).
- Full legal name on the account.
- Any signed AR-10 authorization for the 2027 filing year (2028/29) so you can revoke it if needed.
The Fastest Ways to Cancel or Switch (In Order)
Regardless of method, ensure you are canceling for the 2027 filing year (2028/29 tax grievances) and not your current 2026 (2027/28) tax grievance.
Ways to Cancel Services | How to Cancel Services |
|---|---|
Do Not Sign the Annual Renewal | Many legacy Long Island firms contact returning clients in September to renew automatically. The easiest way to switch is simply to not sign a new authorization for the upcoming tax year. |
Email (recommended) | Request to finish any current tax grievance but to discontinue future property tax services. Include your full name and address(es). If you granted authorization, ask for written acknowledgment of revocation. |
Phone | Call the number on your provider's Contact page. Ask them to send written confirmation of your cancellation for future tax grievances via email, noting the effective date. |
Certified mail (last resort) | If your agreement requires written notice, send a short letter via certified mail and keep the receipt. If you granted authorization, ask for a written acknowledgment of revocation. |
How to Cancel Specific Nassau County Providers
Firm Name | Ways to cancel |
|---|---|
Maidenbaum Property Tax Reduction Group |
|
Empire Tax Reductions |
|
Heller & Consultants Tax Grievance |
|
Zap My Tax (ZMT) |
|
Aventine Properties: Property Tax Grievance Firm |
|
Mark Lewis Tax Grievance Service, Inc. |
|
Disclaimer: This information is provided for informational purposes only and is based on publicly available data as of September 28, 2026.
Cancellation processes and deadlines are subject to change by the provider. Please review your service agreement for the most accurate cancellation instructions.