
63 N.Y.2d 100 (1984)
In the Matter of Nassau Boces Central Council of Teachers, by its President, Robert Dreaper, on Behalf of Adult Education Instructors and All Others Similarly Situated, Appellant,
v.
Board of Cooperative Educational Services of Nassau County et al., Respondents.
Court of Appeals of the State of New York.
Decided September 20, 1984.
Stanley A. Immerman for appellant.
Seymour H. Kligler for Board of Cooperative Educational Services of Nassau County, respondent.
Chief Judge COOKE and Judges JASEN, JONES, WACHTLER, SIMONS and KAYE concur.
*101MEYER, J.
When the respondent in an article 78 proceeding challenges petitioner's standing only, it is error to dismiss the *102 petition on the merits prior to service of respondent's answer. The mandate of CPLR 7804 (subd [f]) that, "If the motion is denied, the court shall permit respondent to answer, upon such terms as may be just" proscribes dismissal on the merits following such a motion, unless the facts are so fully presented in the papers of the respective parties that it is clear that no dispute as to the facts exists and no prejudice will result from the failure to require an answer (see, e.g., O'Hara v Del Bello, 47 N.Y.2d 363). There having been no such development of the facts in the present case, Special Term erred in dismissing the petition on the merits prior to service of respondents' answer. The order of the Appellate Division should, therefore, be reversed and the matter remitted to Special Term for further proceedings in accordance with this opinion.
Petitioner union represents the adult education instructors employed by respondent Board of Cooperative Educational Services of Nassau County (BOCES). The union, and its president, as class representative, brought this article 78 proceeding as a class action on behalf of all of the adult education instructors. The relief sought is a determination that the instructors are entitled to tenure and seniority rights under section 3014 of the Education Law and the Rules of the Board of Regents (8 NYCRR part 30). The petition alleges that such rights have not been waived.
Respondents moved to dismiss the petition on the ground that petitioner lacks standing because neither the union nor its president belong to the class of adult education instructors and because, according to respondents, neither has been injured by the denial of tenure and seniority rights. The motion papers also argued that class action status was improper because individual instructors had signed express waivers of tenure rights and, therefore, a case-by-case determination of the rights of the instructors was required. Petitioner's answering papers asserted that a union has standing to represent its members and also objected to factual allegations made in the affidavit accompanying respondents' motion on the ground that the affidavit was made by an attorney who lacked personal knowledge of the facts.
*103Without passing on either the standing or the class action issues, Special Term dismissed on the merits, ruling that petitioner had waived the tenure and seniority rights of the adult education instructors in its collective bargaining agreement with BOCES, a copy of which was annexed to the petition. Special Term relied on the explicit exclusion in the contract of the adult education instructors from contractual protections relating to probationary periods and seniority. Special Term's order dismissing the petition was affirmed by the Appellate Division in a memorandum that cited cases upholding express waivers of tenure and seniority rights. The appeal is before us by our leave (62 N.Y.2d 605).
Although, as respondents argue, an article 78 proceeding "on analysis closely correspond[s] to an action if a motion for summary judgment could be made simultaneously with the commencement of the action" (8 Weinstein-Korn-Miller, NY Civ Prac, par 7801.03), it is also true that a motion for summary judgment is usually made only "after issue has been joined" (CPLR 3212, subd [a]) and that a motion to dismiss may be treated as a motion for summary judgment only when the parties have had the opportunity to "submit any evidence that could properly be considered on a motion for summary judgment" (CPLR 3211, subd [c]). Thus, notice that a motion to dismiss under CPLR 3211 will be treated as a motion for summary judgment is required prior to dismissal on the merits unless it is clear from the papers that no prejudice has resulted from omission of notice (Rich v Lefkovits, 56 N.Y.2d 276, 283).
The more particularly is this so with respect to an article 78 proceeding, in light of the express direction of CPLR 7804 (subd [f]), quoted at the beginning of this opinion. It has, therefore, been held that the petition in such a proceeding should not be granted before the respondent has filed an answer (Edison Travel v American Airlines, 35 N.Y.2d 801, affg 43 AD2d 164; Hawk Sales Co. v Dieteman, 42 AD2d 817, 818; Matter of Kesterson v City of Buffalo, 40 AD2d 575; see Subcontractors Trade Assn. v Koch, 62 N.Y.2d 422; O'Hara v Del Bello, 47 N.Y.2d 363, supra; Marlow v Kobliner, 78 AD2d 874; Matter of De Vito v Nyquist, 56 AD2d 159, 161, affd 43 N.Y.2d 681).
*104Here, respondents' motion papers disclaimed any attack on the merits, arguing instead that a case-by-case examination of the status of each adult education instructor would be required. To the limited extent that the facts were developed in the affidavit accompanying the motion, petitioner objected on the ground that the affidavit was not made by an officer of BOCES, but by an attorney who lacked personal knowledge (see Zuckerman v City of New York, 49 N.Y.2d 557). Thus, the motion papers clearly did not establish that there were no triable issues of fact and the procedure dictated by CPLR 7804 (subd [f]) should have been followed. Although it was not improper for Special Term to decide the merits of the claim respecting the rights of the adult education instructors without first passing on the question of whether the union and its president had standing to complain about a violation of those rights (Jainchill v Citibank, 62 N.Y.2d 739; Matter of Legal Aid Soc. v Scheinman, 53 N.Y.2d 12; see People v Parker, 41 N.Y.2d 21, 25), it should not have done so prior to answer.
Accordingly, the proceeding should be remitted to Special Term for further proceedings in accordance with this opinion.
On review of submissions pursuant to section 500.4 of the Rules of the Court of Appeals (22 NYCRR 500.4), order reversed, with costs, and matter remitted to Supreme Court, Nassau County, for further proceedings in accordance with the opinion herein.
