III. DISCUSSION
The Does claim that removal under 28 U.S.C. § 1441(a) was improper because (i) the Defendants did not all consent to the removal and (ii) the Court lacks subject matter jurisdiction. Pls.' Mot. Remand 1-3. Because the Defendants have not satisfied their burden of demonstrating compliance with the unanimity requirement, the Court need not address whether it otherwise has subject matter jurisdiction over the claims.
A. Standard of Review
Pursuant to 28 U.S.C. § 1446, a defendant wishing to remove an action to federal court must file a notice of removal within 30 days of the defendant's receipt of the initial pleading or summons. Where a complaint names multiple defendants, all of the defendants must consent to the removal. See 28 U.S.C. § 1446(b)(2)(A) ("When a civil action is removed solely under section 1441(a), all defendants who have been properly joined and served must join in or consent to the removal ...."); Chicago, Rock Island and Pac. Ry. Co. v. Martin , 178 U.S. 245, 248, 20 S.Ct. 854, 44 L.Ed. 1055 (1900). Defendants generally "are not required to join in the petition," however, "if they have not yet been served with process at the time the petition is filed." Karpowicz v. Blue Cross & Blue Shield of Mass., Inc. , Civ. A. No. 96-10050-MLW, 1996 WL 528372, at *3 (D. Mass. Aug. 19, 1996) (Wolf, J.).
While "[t]he defect in the removal process resulting from a failure of unanimity is not considered to be a jurisdictional defect" and thus may be waived, a plaintiff has thirty days in which to object and move to remand based on the procedural defect. Esposito v. Home Depot U.S.A., Inc. , 590 F.3d 72, 75 (1st Cir. 2009) ; see also 28 U.S.C. § 1447(c). Once a plaintiff so moves, "the burden is upon the removing party to show ... that removal is proper." Therrien v. Hamilton , 881 F.Supp. 76, 78 (D. Mass. 1995). In making such determinations, courts ought bear in mind "the principle that removal statutes are to be narrowly construed." Esposito , 590 F.3d at 76.
B. Consent to Removal
Only three of the six named defendants-the three Removing Defendants-joined the notice of removal filed on September 14, 2017.3 See Defs.' Notice Removal. The Removing Defendants claim, however, that the exclusion of McGuire, Krakow, and the METCO Board of Directors4 from the notice of removal is immaterial *270because these parties had not yet been served. Defs.' First Opp'n 3. Though they recognize that McGuire was in fact served on September 14, the same day as the notice of removal was filed, the Removing Defendants maintain that they did not need to obtain her consent because there was no proof of service on file with the Suffolk County Superior Court at the time of removal. Defs.' Opp'n Mot. File Am. Mot. Remand ("Defs.' Second Opp'n") 1-2, ECF No. 16. They further submit that because an attorney for Krakow filed an appearance in federal court on October 16, before the expiration of Krakow's thirty-day period, Krakow can be deemed to have timely consented. Id. at 2.
The Removing Defendants' argument relies on the common exception to the unanimity rule that defendants who have not yet been served at the time the removal notice is filed need not consent to the removal. This exception stems from the language of section 1446(b)(2)(A), which states that "all defendants who have been properly joined and served must join in or consent to the removal of the action." 28 U.S.C. § 1446(b)(2)(A) (emphasis added); see Karpowicz , 1996 WL 528372 at *3. Though the Removing Defendants' interpretation of this exception is generally correct, their argument fails for several reasons.
First, courts in the First Circuit have consistently ruled that the consent requirement ought not be waived if all of the defendants were served within thirty days of one another-that is, if the removing defendant had the opportunity to consult with its codefendants before filing notice of removal. See, e.g. , Karpowicz , 1996 WL 528372 at *7 ; Hill v. Phillips, Barratt, Kaiser Eng'g Ltd. , 586 F.Supp. 944, 946 (D. Me. 1984). For example, Judge Wolf in Karpowicz held that the removal of a case was invalid because the defendant "had more than 10 days to persuade [a codefendant] to agree to removal" before the codefendant's 30-day time limit under section 1446 expired. Karpowicz , 1996 WL 528372 at *7. Though these cases involve situations where a later-served defendant failed to obtain the consent of an earlier-served defendant, the logic ought still apply where an earlier-served defendant removes the action so needlessly early that it deprives defendants served only days later of the opportunity to reject the removal.
Here, the defendants were all served within thirty days of one another. Given the timing of service on their codefendants, the Removing Defendants had 27 days to procure McGuire's consent before the expiration of their removal window on October 11; 19 days to obtain Krakow's consent; and 8 days to obtain consent from the METCO Board of Directors. Instead, they chose to file the notice of removal three days after receiving the complaint, without consulting any other codefendant. Under these circumstances, excusing unanimity would deviate from the longstanding principle that each defendant has the right to exercise an "absolute veto over removal." Garside v. Osco Drug, Inc. , 702 F.Supp. 19, 21 (D. Mass. 1988) (Tauro, J.).
Second, even assuming that the appearance of an attorney on behalf of Krakow constitutes a sufficient manifestation of consent within Krakow's thirty-day removal window (which itself is questionable given that "courts typically require some type of writing that evinces consent," Esposito , 590 F.3d at 76 ), the Removing Defendants needed the consent of McGuire, which they do not claim to have obtained.
*271Strict construal of the removal statutes compels the conclusion that the Removing Defendants were required to obtain McGuire's consent because she was served on the same day as the notice of removal was filed. The removal statute does not require the consent of "all defendants whose proof of service is on file" ; rather, it requires the consent of "all defendants who have been properly joined and served." 28 U.S.C. § 1446(b)(2)(A). Allowing defendants to use proof of service as a proxy for actual service would be particularly ill-advised in Massachusetts, where "[f]ailure to make proof of service ... 'does not affect the validity of the service.' " Sindi v. El-Moslimany , Civ. A. No. 13-10798-GAO, 2014 WL 1281522, at *1 (D. Mass. Mar. 26, 2014) (O'Toole, J.) (quoting Mass. R. Civ. P. 4(f) ).5
Basic dictates of fairness also suggest that McGuire's right to object to removal should not be vitiated merely because the Removing Defendants saw no proof of service on the docket. This Court agrees with the conclusions of other courts confronting similar situations that a removing defendant must exercise reasonable diligence, beyond a glance at the docket, in attempting to discern the status of service on codefendants and obtain unanimous consent. See, e.g. , Aqua-Gulf Transp., Inc. v. Twin Cty. Transp. , No. Civ. A. 06-1952(JLL), 2006 WL 3591291, at *4 (D.N.J. Dec. 11, 2006) ("Even where ... no counsel has made an appearance ... and no proof of service has been filed with respect to that named defendant, the removing defendant nevertheless has the duty to insure that such named defendant has consented to the removal."); Pianovski v. Laurel Motors, Inc. , 924 F.Supp. 86, 87 (N.D. Ill. 1996) ("A phone call to the Clerk and an instruction to a docketing employee are insufficient to demonstrate diligence."); Prowell v. West Chem. Prod., Inc. , 678 F.Supp. 553, 555 (E.D. Pa. 1988) ; cf. Milstead Supply Co. v. Casualty Ins. Co. , 797 F.Supp. 569, 573 (W.D. Tex. 1992) (excusing lack of unanimity where, among other reasons, the removing defendant had been "more than reasonably diligent" in attempting to ascertain whether codefendant had been served). Thus, McGuire's lack of consent renders the Defendants' notice of removal fatally defective.
Third, even if the Removing Defendants were not required to obtain any other defendant's consent, their removal notice is still defective. Though the First Circuit does not seem to have spoken to this issue, other circuits have held that when a defendant files a notice of removal without obtaining the consent of all codefendants, the defendant must explain the absence of unanimous consent in the notice of removal. See, e.g. , Northern Ill. Gas Co. v. Airco Indus. Gases , 676 F.2d 270, 273 (7th Cir. 1982) ("[A] petition filed by less than all of the named defendants is considered defective if it fails to contain an explanation for the absence of co-defendants."); Wright v. Missouri Pac. R. Co. , 98 F.2d 34, 36 (8th Cir. 1938) (reversing retention of federal jurisdiction where removal petition failed to allege the ground on which consent of a codefendant was unnecessary). The Removing Defendants here fail to make any mention of the unanimity requirement in their notice of removal. See Defs.' Notice Removal. Moreover, they seem not to have undertaken any effort to amend the notice of removal.Consequently, even if the Removing *272Defendants did not need the consent of the three other defendants, the case should be remanded on the basis that the notice of removal is defective.
Finally, the Removing Defendants incorrectly assert that it was necessary to file this motion without the consent of the other parties because they otherwise would have forfeited their right to remove under the "first-served defendant rule." Defs.' First Opp'n 3. It is worth noting that this Court has rejected the first-served defendant rule, see BCCTC Assocs., Inc. v. Summerdale/AAHFI, L.P. , 656 F.Supp.2d 208, 213 (D. Mass. 2009), but more importantly, the 2011 amendments to section 1446 all but abrogated this rule, see 28 U.S.C. 1446(b)(2)(C) ("If defendants are served at different times, and a later-served defendant files a notice of removal, any earlier-served defendant may consent to the removal even though that earlier-served defendant did not previously initiate or consent to removal."). Even if the first-served defendant rule were still in effect, however, it would not excuse the Removing Defendants' noncompliance with the unanimity requirement. This judicially crafted rule provides only that a "first-served defendant [who] fails to file the notice of removal during his thirty day period ... definitively forfeits his right to remove." BCCTC Assocs. , 656 F.Supp.2d at 213. Though it relates to the issue of consent, the rule was developed to resolve claims of untimeliness, where later-served defendants filed a notice of removal after the removal period for earlier-served defendants had expired. See id. ; Gorman v. Abbott Labs. , 629 F.Supp. 1196, 1201 (D.R.I. 1986) ; Hill , 586 F.Supp. at 946.
In other words, the Removing Defendants appear to be confusing their obligation to remove on a timely basis with their obligation to obtain unanimous consent. In BCCTC Associates , this Court observed that timely notice by one group of defendants "does not guarantee removal because the consent of all other defendants is required," recognizing that "[i]t is crucial to distinguish the ability to file the notice and the ability to consent." Id. at 214 & n.4. Here, though the first-served Removing Defendants' notice of removal was timely, removal was improper because they made no attempt to obtain the consent of the latter-served defendants, despite having the opportunity to do so within their thirty-day removal window. This conclusion strikes a fair compromise between the interest of the first group to preserve their right to remove and the interest of the second group to participate in "[this] matter of trial strategy." Garside , 702 F.Supp. at 21.
IV. CONCLUSION
For the foregoing reasons, this Court on December 12, 2017 granted the Does' motion to remand and remanded this case to the Massachusetts Superior Court sitting in and for the County of Suffolk. See ECF No. 47, No. 48.