N.Y. Domestic Relations Law § 116
3. The judge or surrogate shall cause to be made an investigation by a disinterested person who in the opinion of the judge or surrogate is qualified by training and experience, or by an authorized agency specifically designated by him to examine into the allegations set forth in the petition. A post-placement investigation conducted pursuant to the provisions of this section shall be made by a disinterested person who in the opinion of the judge or surrogate is qualified by training and experience to perform post-placement investigations. Such disinterested person shall certify to the court that he or she is a disinterested person and has no interest in the outcome of petitioner's or petitioners' application. Such disinterested person shall further disclose to the court any fee paid or to be paid to such person for services rendered in connection with the post-placement investigation. The investigator shall make a written report of his investigation into the truth and accuracy of the allegations of the petition, and, where applicable, into the statements contained in the affidavit required by section one hundred fifteen of this title, and he shall ascertain as fully as possible, and incorporate in his report the various factors which may bear upon the determination of the application for adoption including, but not limited to, the following information: