ORDERED that the order is affirmed, with costs.
In a certification order dated October 29, 1999, counsel for the plaintiff and the defendants certified that all discovery and pretrial motions were complete, and the Supreme Court, sua sponte, directed the plaintiff to serve and file a note of issue within 90 days. The order specified that a failure to comply "may serve as a basis for dismissal pursuant to CPLR 3216". Counsel for both the plaintiff and the defendants signed the order. Under these circumstances, the certification order had the same effect as a duly served 90-day notice (see, Doyle v. South Nassau Comm. Hosp, 270 A.D.2d 225; Safina v. Queens Long Is. Med. Group, 238 A.D.2d 395; Longacre Corp. v. Better Hosp. Equip. Corp., 228 A.D.2d 653).
After the plaintiff failed to comply with this order by either timely filing a note of issue or moving to extend the 90-day period (see, Flomenhaft v. Baron, 281 A.D.2d 289; Trust Co. of N.J. v. Genser, 271 A.D.2d 524; Seletsky v. St, Francis Hosp., 263 A.D.2d 452), the defendants moved to dismiss the complaint. To avoid dismissal, the plaintiff was required to show a justifiable excuse for the delay and a good and meritorious cause of action (see, CPLR 3216[e]). The conclusory and unsubstantiated assertion of law office failure made by the plaintiff's attorney was insufficient to excuse the nine-month delay in complying with the 90-day notice (see, Gourdet v. Hershfeld, 277 A.D.2d 422; Gray v. Gray, 266 A.D.2d 261; Eretz Funding v. Shalosh Assocs., 266 A.D.2d 184; Rudy v. Chasky, 260 A.D.2d 625). Furthermore, the plaintiff failed to demonstrate that the defendants were negligent in the happening of this accident (see, Mejia v. Navarro, 276 A.D.2d 535; Alexis v. Lessey, 275 A.D.2d 754; Lakhan v. Singh, 269 A.D.2d 427; Tosov v. CB Venture Corp., 261 A.D.2d 535; Verdino v. Alexandrou, 253 A.D.2d 553). Accordingly, the Supreme Court properly granted the defendants' motion to dismiss the complaint.
BRACKEN, P.J., KRAUSMAN, LUCIANO, SMITH and ADAMS, JJ., concur.