N.Y. Comp. Codes R. & Regs. tit. 9, § 6217.6
(f) Following completion of the preceding steps, the county board shall mail:
(g) The request for more information shall inform the voter that: "THE FAILURE TO CONTACT THE BOARD OF ELECTIONS AND CORRECT ANY INACCURACIES IN THE APPLICATION OR PROVIDE REQUESTED ADDITIONAL INFORMATION MAY RESULT IN A REQUEST FOR IDENTIFICATION AT THE POLLS IN ORDER TO CAST A VOTE ON A VOTING MACHINE." If such notice is returned undelivered without a new address, the board shall forthwith send such applicant a confirmation notice pursuant to the provisions of section 5-712 of the Election Law and place such applicant in inactive status.
(h) Notices of approval.
Notices of approval with requests for more information or notices of rejection shall be sent by nonforwardable first class or return postage guaranteed mail on which is endorsed "ADDRESS CORRECTION REQUESTED" and which contains a request that any such mail received for persons not residing at the address be dropped back in the mail.
(l) The notices of approval and notices of approval with requests for more information shall also advise the registrant: