¶1This case presents an appeal from a Superior Court judge’s denial of a motion pursuant to Mass.R.Civ.P. 60(b), 365 Mass. 828 (1974), to vacate a default judgment entered against the defendant, John Niakaros. Because the record does not demonstrate that the plaintiff complied with the requirements of Mass.R.Civ.P. 4, as amended, 402 Mass. 1401 (1988), and Mass.R.Civ.P. 5(a), as amended, 387 Mass. 1221 (1983), we reverse and remand for proceedings consistent with this opinion.
¶2Background. The parties’ dispute arises from a home improvement and remodeling project gone awry. The plaintiff, Paul Wang, and Niakaros entered into two contracts during the summer of 2003, the first to remodel Wang’s basement and the second to renovate his driveway. Disputes arose promptly over *167the scheduling, scope, and cost of the project(s). The record describes heated exchanges and threats which generated several police reports and led Wang to file a complaint (the original complaint) in December of 2003 seeking a civil restraining order against Niakaros. The Superior Court docket contains two entries of “service returned” relating first to the issuance of a temporary restraining order (TRO) issued ex parte and thereafter to a continuation in force of the TRO after a hearing. While Niakaros does not specifically acknowledge that he was served with the original complaint, he does not contest that he attended a hearing and opposed the request for a restraining order in late 2003.
¶3Also in late 2003, and after the filing of the original complaint, Wang, through his attorney, sent Niakaros a demand letter under G. L. c. 93A. The demand letter asserted actual damages of approximately $30,000 and made the customary references to multiple damages and attorney’s fees. Niakaros evidently retained counsel because a response signed by his lawyer was duly generated.
¶4In April of 2004, Wang filed an amended complaint and demand for jury trial. The amended complaint, filed as of right because no responsive pleading had yet been filed, repeated the TRO count contained in the original complaint and added two additional counts against Niakaros, one for breach of contract and one pursuant to G. L. c. 93A.
¶5In opposition, Wang filed a document entitled “Plaintiff’s Response to Affidavit of the Defendant, John Niakaros.” This document, in the form of an answer, recited the single word “Deny” with respect to all thirteen paragraphs of Niakaros’s affidavit, including those containing the statements summarized above. It concluded with the statement: “Defendant’s claims that he was unaware of the pendency of this matter are perjurious.” We note that this document was unsworn, but was signed by counsel and subject to the requirements of Mass. R.Civ.P. 11, 365 Mass. 753 (1974).
¶6On August 16, 2005, the Superior Court judge entered an order denying Niakaros’s emergency motion for relief from judgment, and this appeal ensued.
¶7Discussion. It is well established as a general matter that denial of a motion under rule 60(b) will be set aside only on a clear showing of an abuse of discretion. Murphy v. Administrator of the Div. of Personnel Admn., 377 Mass. 217, 227 (1979). However, an important exception exists to the principle that a motion for relief from judgment is addressed to the judge’s discretion. If a judgment is void for lack of subject matter or personal jurisdiction, or for failure to conform to the requirements of due process of law, the judge must vacate it. See Harris v. Sannella, 400 Mass. 392, 395 (1987); O’Dea v. J.A.L., Inc., 30 Mass. App. Ct. 449, 455 (1991).
¶8Neither the docket nor any other portion of the record reflects service of the amended complaint; additionally, Niakaros’s affidavit stated he did not know of the filing of “this complaint.”
¶9Absent a justification for Wang’s failure to effect proper service of process of the amended complaint pursuant to rule 4, *171Niakaros had no obligation to answer the amended complaint, and there was manifestly no basis to enter an order of default or a default judgment. While the pleadings do suggest a justification for noncompliance with rule 4, the record does not contain admissible evidence supporting such a result.
¶10The pleadings below and the briefs on appeal contain numerous assertions that Niakaros’s former counsel knew of the amended complaint and engaged in a pattern of delay and evasion.
¶11*172Although the failure to satisfy due process makes it unnecessary to consider other issues, for purposes of consideration on remand we note the integral relationship between proper service and the court’s acquisition of personal jurisdiction over the defendant. If a court’s competence to resolve a suit “involves merely a determination of the personal liability of the defendant, he must be brought within its jurisdiction by service of process within the State, or his voluntary appearance.” Pennoyer v. Neff, 95 U.S. 714, 733 (1877), overruled on other grounds by Shaffer v. Heitner, 433 U.S. 186 (1977).
¶12A determination whether a defendant has waived the defense of personal jurisdiction closely tracks the inquiry required to determine whether noncompliance with rule 4 can be overlooked without violating due process requirements. “The common factors in a waiver of personal jurisdiction are ‘dilatoriness and participation in, or encouragement of, judicial proceedings.’ ” Lamarche v. Lussier, 65 Mass. App. Ct. 887, 889-890 (2006), quoting from Precision Etchings & Findings, Inc. v. LGP Gem, *173Ltd., 953 F.2d 21, 25 (1st Cir. 1992). See Vangel v. Martin, 45 Mass. App. Ct. 76, 78 (1998) (defendant’s nonassertion of the defense of lack of jurisdiction, coupled with her conducting discovery and opposing and filing motions for temporary orders in divorce proceedings, constituted a waiver of the defense); Sarin v. Ochsner, 48 Mass. App. Ct. 421, 422-423 (2000) (defendants’ appearance at hearings and their filing of motions to disqualify counsel and for a stay of discovery amounted to a waiver of the defense of lack of jurisdiction). We note that the descriptions of delay and disruption below engender keen sympathy for the efforts of the judge to conduct business in the face of a seriously uncooperative litigant; nevertheless, the record currently contains no basis on which Niakaros can be defaulted.
¶13Conclusion. The order denying Niakaros’s emergency motion for relief from judgment is reversed. The case is remanded for further proceedings to determine whether Niakaros can be held liable for damages claimed in the amended complaint notwithstanding the failure to demonstrate proper service. In the event it should be determined that he can be held so hable, the judge’s exercise of discretion in deciding Niakaros’s rule 60(b) motion should include consideration, “among other relevant circumstances, of at least” each of the factors outlined in Berube v. McKesson Wine & Spirits Co., 7 Mass. App. Ct. 426, 430-431 (1979).
¶14So ordered.
¶15The response, by agreement of counsel, was deemed timely although it arrived approximately three weeks after the expiration of the thirty-day response period provided by the statute. This was allegedly the first of many such requests for additional time, the relevance of which will become increasingly apparent below. See note 7, infra.
¶16The amended complaint also added a second defendant, Albert Watson, alleged by Wang to have improperly allowed Niakaros to operate under his, Watson’s, contractor’s license. Niakaros finds sinister implications in Wang’s *168failure to default his codefendant, Watson, who also failed to respond to the amended complaint. Watson, however, is irrelevant to the issues before us.
¶17Niakaros’s affidavit and Wang’s response raise the question whether Niakaros can properly be charged with the consequences of behavior alleged against his former counsel and summarized in note 7, infra, if such behavior is established. Compare Maki v. New York, N.H. & H.R.R., 293 Mass. 223, 223 (1936); Berube v. McKesson Wine & Spirits Co., 7 Mass. App. Ct. 426, 431 (1979), with Colley v. Benson, Young & Downs Ins. Agency, Inc., 42 Mass. App. Ct. 527, 535 (1997); Ruml v. Ruml, 50 Mass. App. Ct. 500, 506-507 (2000).
¶18Since Niakaros appeared at a hearing after the filing of the original complaint, this phrase necessarily referred to the amended complaint.
¶19Notwithstanding his attendance at the hearing to consider Wang’s request for a restraining order in late 2003, Niakaros never answered the original complaint or appeared in the suit, thereby falling squarely within the category of a “party in default for failure to appear.” See Varnes v. Local 91, Glass Bottle Blowers Assn. of U.S. & Canada, 674 F.2d 1365, 1368 n.3 (11th Cir. 1982); Fluor Engrs. & Constructors, Inc. v. Southern Pac. Transp. Co., 753 F.2d 444, 449 n.7 (5th Cir. 1985); Mass.R.Civ.P. 11(b), 365 Mass. 753 (1974).
¶20When an amended pleading reasserts the allegations of the original, “[rjesort to the original complaint cannot be made to cure the defective amended complaint.” National Constr. Co. v. National Grange Mut. Ins. Co., 10 Mass. App. Ct. 38, 40 (1980). See Phillips v. Murchison, 194 F. Supp. 620, 622 (S.D.N.Y. 1961), citing Nisbet v. Van Tuyl, 224 F.2d 66, 71 (7th Cir. 1955); Bullen v. De Bretteville, 239 F.2d 824, 833 (9th Cir. 1956), cert. denied, 353 U.S. 947 (1957) (where a subsequent complaint restated the allegations contained in a previous one, “that amended complaint superseded the original complaint”).
¶21These submissions contain references to serial requests for continuances, a request to remove a default to allow the filing of an answer that was never filed, and the failure of Niakaros’s former counsel to appear at conferences rescheduled at his request, all in reference to the amended complaint. We note one supportive but ultimately inconclusive document in the record: a copy of the August, 2004, order of default containing a telecopier transmission line indicating it was sent from the office of Niakaros’s former counsel on November 24, 2004.
¶22In Shaffer, the United States Supreme Court rejected the distinction made in Pennoyerbetween different forms of personal jurisdiction for purposes of determining minimum contacts under International Shoe Co. v. Washington, 326 U.S. 310 (1945), but preserved, if it did not strengthen, the relationship between proper service and personal jurisdiction. Shafferv. Heitner, 433 U.S. at 206-212. See Wright & Miller, Federal Practice & Procedure § 1074, at 358 n.2 (2002) (noting that the Court’s decision in Phillips Petroleum Co. v. Shutts, 472 U.S. 797, 808-812 [1985], which considered notice for purposes of inclusion as a plaintiff in a class action, “also suggests a connection between personal jurisdiction and notice”).