Do I need a notary for the Supplement to Form RP-425-E?

No. The form calls for signatures and dates from the owners and any owner’s spouse who resides on the premises; it does not require notarization.

How do I submit the Supplement to Form RP-425-E?

Submit it to your assessor with Form RP-425-E and proof of income.

Who must provide information on this form?

Every property owner and any owner’s spouse who resides on the premises must provide the requested information, including a Social Security number and signature.

What income documents can I identify on the form?

The form lists Federal Form 1040, New York State Form IT-201, and Form RP-425-Wkst as income documentation options. If you did not file a required-year return, the instructions say to submit the worksheet.

Mexico, NY · Oswego County

No notary required

Supplement to Form RP-425-E

This supplemental form collects owner and household information for Mexico property owners applying or reapplying for the Enhanced STAR exemption.

At a glance

Issued by: City of Mexico · Mexico, Oswego County, New York
Notarization: Not required: file this form without a notary.
Official source: townofmexicony.gov
Blank form: Download the PDF
Catalogued: Sep 28, 2026
Machine-readable: JSON record · about the forms index

What this form is

This form is required when applying or reapplying for the Enhanced STAR exemption and must accompany Form RP-425-E and proof of income. It asks for property and contact details, information and Social Security numbers for every owner and qualifying spouse, income documentation, and each person’s signature and date. The form also includes authorization for annual income verification.

Who needs it

Property owners applying or reapplying for the Enhanced STAR exemption must complete this supplement and provide information for every owner and any owner’s spouse who resides on the premises.

How to submit it

Submit this form to your assessor along with Form RP-425-E and proof of income, as described in the instructions.

About notarization

This document is signed and dated without a notary; the form contains no separate notarized or sworn attachment requirement.

How to submit this form

1
Download The Form
Download the Supplement to Form RP-425-E PDF.
2
Complete The Form
Provide the requested property, owner, spouse, income, and contact information. Each listed person signs and dates the form.
3
Gather Required Documents
Include Form RP-425-E and proof of income. If you did not file a required-year tax return, the instructions call for Form RP-425-Wkst.
4
Submit To Your Assessor
Submit the completed supplement and accompanying documents to your assessor.

Frequently asked questions

Do I need a notary for the Supplement to Form RP-425-E?: No. The form calls for signatures and dates from the owners and any owner’s spouse who resides on the premises; it does not require notarization.
How do I submit the Supplement to Form RP-425-E?: Submit it to your assessor with Form RP-425-E and proof of income.
Who must provide information on this form?: Every property owner and any owner’s spouse who resides on the premises must provide the requested information, including a Social Security number and signature.
What income documents can I identify on the form?: The form lists Federal Form 1040, New York State Form IT-201, and Form RP-425-Wkst as income documentation options. If you did not file a required-year return, the instructions say to submit the worksheet.

Need something notarized?

This Supplement to Form RP-425-E doesn’t need a notary, but if you have another Mexico form that does, a commissioned online notary can help.