N.Y. Comp. Codes R. & Regs. tit. 11 § 227.4
If an insurer, insurance producer, or affiliate receives correspondence related to force-placed insurance from a borrower on behalf a servicer, then the insurer, insurance producer, or affiliate shall accept any reasonable form of written confirmation, from the borrower or otherwise, of existing hazard insurance that complies with the mortgage loan contract's requirements to maintain hazard insurance, which shall include the existing hazard insurance policy number along with the identity of, and contact information for, the insurer or insurance producer. An insurer, insurance producer, or affiliate that receives correspondence related to force-placed insurance from a borrower on behalf a servicer may require a copy of the borrower's hazard insurance policy declaration page, the borrower's hazard insurance certificate, the borrower's hazard insurance policy, or other similar forms of written confirmation. An insurer, insurance producer, or affiliate that receives correspondence related to force-placed insurance from a borrower on behalf a servicer may reject evidence of hazard insurance submitted by a borrower if neither the borrower's insurer nor the borrower's insurance producer provides confirmation of the hazard insurance information submitted by the borrower, or if the terms and conditions of the borrower's hazard insurance policy do not comply with the borrower's mortgage loan contract requirements.
N.Y. Comp. Codes R. & Regs. Tit. 11 § 227.4