New York Consolidated Laws, Election Law - ELN § 8-308. Voting;  voting write-in

1. Ballots voted for any person whose name does not appear on the ballot as a nominated or designated candidate for public office or party position are referred to in this article as write-in ballots.

2. Any write-in vote for a candidate whether or not such candidate's name is on the ballot for that contest shall be counted for such candidate unless such write-in vote creates an invalid overvote in the contest.

3. A write-in ballot must be cast in its appropriate place on the ballot, or it shall be void and not counted.

4. A write-in ballot cast in a party primary for a candidate not enrolled in such party shall be void and not counted.

5. A write-in ballot may also be cast by the use of a name stamp.  The use of name stickers, labels or pasters is prohibited.