Representative Page

All Representatives and Attorneys filing on any property as a representative, where you are not the owner, must register and obtain a representative number from ARC. Please email arcoperations@nassaucountyny.gov for further information. 

ARC Representative Due Dates

DATEITEM DUE
February 10, 2025Deadline for residential and commercial request for status change, withdrawals of applications 2025/26 and processing any Consents to Change for tax year 2025/26
March 3, 2025Last day to Process AR70's for implementation for the Final 2025/26 Roll
March 3, 2025
April1, 2025

After March 15, 2025
Last day to file 2026/2027 Grievances
Deadline extended for 2026/2027 Tax Year

Withdrawals for 2026/27

 

Forms For Attorneys and Other Representative
Adobe Acrobat format (PDF)

Form AR 10 (PDF)
Authorization to Represent an Individual Taxpayer (PDF)

Residential Rent Roll Template (PDF)

Commercial Rent Roll Template (PDF)

Form AR 70 (PDF)
 ARC Stipulation

Form AR 71 (PDF)
 ARC Residential Stipulation

ARC Stipulation Discontinuance (PDF)

Consent to Change Attorney Template (PDF)

 Bulk Upload layout and Specification 
ARC Filing Procedures (PDF)
 
Protest e-File Layout (PDF)
 
Parcel Number Format (PDF)
 
Authorization Image File Specification (PDF)

AR20 Bulk Upload Layout and Specification
AR 20 e-file Layout


Forms For Attorneys and Other Representative
Adobe Acrobat format (PDF)

ARC AR20 Online Filing Procedures
 
AR20 Bulk Upload Attachments Naming Convention
 
AROW AR20 Filing Guide 

 (Updated 4/17/2025 – PDF ~3mb)

Applications for Correction filed in 2025 for the 2026-27 year
(Updated 4/17/2025 xlsx ~14mb)