Before us are consolidated appeals from orders entered on June 9, 1982, denying Richard Neyhard’s [hereinafter “appellant”] petition to intervene in the above-captioned class action and dismissing his objections to the proposed settlement therein. The appellant further challenges the order entered on June 10, 1982, approving the settlement as to subclass three.1 All three orders were entered by the Honorable William W. Lipsitt of the Court of Common Pleas of Dauphin County.
On November 14, 1978, Cynthia Wilson, as administratrix of the estate of Keith Wilson, her deceased husband, [hereinafter “Wilson”] commenced an action against State Farm Mutual Insurance Company [hereinafter “State Farm”] *579seeking to recover postmortem work loss benefits due from State Farm as a result of the death of her husband in a motor vehicle accident. These benefits were sought pursuant to the Pennsylvania No-Fault Motor Vehicle Insurance Act.2 On November 3, 1980, Wilson filed a class action complaint on behalf of herself and all previously employed Pennsylvania residents, insured by State Farm, who sustained fatal injuries in motor vehicle accidents within two years prior to the date of her husband’s death.
By order of the Court of Common Pleas of Dauphin County, dated July 20, 1981, the following two subclasses were “conditionally” certified pursuant to Pa.R.Civ.P. 1702:
(1) When a deceased motor vehicle accident victim is survived solely by a spouse or solely by a spouse and minor children or solely by minor children, these survivors shall constitute a subclass.
(2) When a deceased motor vehicle accident victim is not survived by a spouse or by minor children, but is survived solely by other “survivors” delineated in § 103 of the Act3 and these other “survivors” have been recognized by the insurance carrier as dependent, either by the carrier’s having paid them “survivor’s loss” benefits or otherwise, then these other survivors shall constitute a subclass.
Wilson v. State Farm Mutual Insurance Company, 103 Dauph.C.Rep. 25, 28 (1981). The court further stated, “Our organization of the class into these subclasses has been carefully scrutinized to sift out cases in which an initial inquiry on dependency is necessary.” Id at —. The court’s reluctance to include cases in which a claimant’s dependency was in question stemmed from a recognized lack of commonality of law and fact between these cases and those of the certified subclasses and from the uncer*580tainty of the law regarding the recoverability of post mortem work loss benefits by estates and nondependents.4
Following this certification, State Farm provided Wilson with a list of the names of individuals who State Farm believed fell within the two subclasses. The court approved a notice which was sent to all the individuals appearing on the list. The notice informed the recipients that they might be entitled to benefits if they were a spouse, dependent child, or dependent relative of an insured person killed in a motor vehicle accident within approximately a six (6) year period. Unfortunately, fifty-three (53) individuals mistakenly received identical notices' despite the fact that those individuals were not within the enumerated categories. These fifty-three (53) recipients are best described as persons representing decedents who had no “survivors” as that term is defined in the Pennsylvania No-Fault Motor Vehicle Insurance Act.5
Meanwhile, the appellant instituted a separate class action in the Court of Common Pleas of Philadelphia County, Neyhard v. State Farm Mutual Insurance Company, March Term 1981, No. 608. The appellant is the father and administrator of the estate of Christopher Neyhard, an employed young man who, following a fatal automobile accident, left no dependent “survivors”. The Neyhard complaint sought recovery of post mortem work loss benefits for all estates and/or survivors of decedents killed in motor vehicle accidents and insured by State Farm.6 This action has been temporarily stayed.
Given the definition of the two certified subclasses, the appellant was patently not a member and it appeared that neither he nor the class of other nondependents he repre*581sented would be impacted by a resolution of the Wilson proceedings.
On February 11, 1982, Wilson filed a motion for partial summary judgment and, at about this time, the respective parties commenced settlement negotiations. Settlement terms were reached and were set forth in a stipulation of settlement dated May 17, 1982.
Under the terms of the stipulation of settlement, class one encompassed ninety-six (96) claims in which each class member was admittedly or presumptively dependent upon the decedent and no statute of limitations defense existed; class two encompassed one hundred and thirty-three (133) claims in which dependency was similarly admitted or presumed yet the statute of limitations may not have been properly tolled; class three was comprised solely of the fifty-three (53) “nondependent” claims. It was agreed that class one members would receive in settlement the full value of the applicable policy limits plus two years of interest at the statutory rate of 18% per year, totaling an individual estimated payment of $20,400.00. Class two members would receive one-half of their policy limits plus one and one-half years’ interest at the 18% rate, totaling an individual estimated payment of $9,525.00. Class three members would receive individual payments of $6,000.00.
In accordance with Pa.R.Civ.P. 1714(c), the parties prepared a notice of proposed settlement which was submitted to, and approved by, the lower court. This notice included a description of the third new subclass and set forth the terms of each class’ recovery. The members of all three classes received this notice.
A public hearing on the proposed settlement in Wilson was held on June 9, 1982. At this hearing, the appellant presented his petition to intervene and his objections to the proposed settlement. The lower court denied *582the petition and dismissed the objections.7 This timely appeal followed.8
*583Pa.R.Civ.P. 2327 speaks directly to the issue of who may intervene in a civil action:
At any time during the pendency of an action, a person not a party thereto shall be permitted to intervene therein, subject to these rules if
(1) the entry of a judgment in such action or the satisfaction of such judgment will impose any liability upon such person to indemnify in whole or in part the party against whom judgment may be entered; or
(2) such person is so situated as to be adversely affected by distribution or other disposition of property in the custody of the court or of an officer thereof; or
(3) such person could have joined as an original party in the action or could have been joined therein; or
(4) the determination of such action may affect any legally enforceable interest of such person whether or not he may be bound by a judgment in the action.
The burden is on the petitioner to satisfy the requirements of Rule 2327. See Startzell v. Montgomery Plaza, Inc., 96 Mont.C.Rep. 1 (1972), aff'd per curiam, 451 Pa. 585, 303 A.2d 824 (1973).
Additionally, we are mindful that the question of intervention is a matter within the sound discretion of the trial court. Unless there is a manifest abuse of such discretion, its exercise will not be interfered with on review. See Darlington v. Reilly, 363 Pa. 72, 69 A.2d 84 (1949); see also Marion Power Shovel Co. v. Fort Pitt Steel Casting Co., 285 Pa.Super. 45, 426 A.2d 696 (1981).
The appellant’s brief addresses itself, without expressly so stating, to Rule 2327(4)’s allowance of intervention in cases where the petitioner possesses a legally enforceable interest, which will be affected by the determination of an action. The appellant argues that, having commenced a separate action on behalf of himself and a class of individuals allegedly inclusive of class three members in the Wilson action, he, as their representative, possesses a legal*584ly enforceable interest compelling his intervention. In light of the particular facts before us, we agree.
The rule as to what constitutes a legally enforceable interest is unclear. See Application of Biester, 487 Pa. 438, 442 n. 2, 409 A.2d 848, 850-51 n. 2 (1979). The lower court found:
Because Mr. Neyhard was not listed as a member of the plaintiffs’ class and, in view of the fact that there has been no certification of a class which Neyhard purports to represent nor approval of his counsel as counsel for the class, this Court was compelled to deny the motion for intervention.
Lower Court Opinion at 5.
The lower court’s emphasis upon the appellant’s class’ lack of certification was misplaced. Pa.R.Civ.P. 1701(a) states:
“Class action” means any action brought by or against parties as representative of a class until the court by order refuses to certify it as such or revokes a prior certification under these rules.
In Bell v. Beneficial Consumer Discount Co., 465 Pa. 225, 348 A.2d 734 (1975), the supreme court observed:
When an action is instituted by a named individual on behalf of himself and a class, the members of the class are more properly characterized as parties to the action. A subsequent order of a trial court allowing an action to proceed as a class action is not a joinder of the parties not yet in the action. The class is in the action until properly excluded.
Id., 465 Pa. at 229, 348 A.2d at 736; see also Goodrich-Amram 2d § 1701:1 (Supp.1984).
In March of 1981, the appellant commenced his class action as a nondependent survivor of his insured son. The action was commenced to recover work loss benefits on behalf of himself and all others similarly situated. On July 20, 1981, two Wilson subclasses were provisionally9 certified. Those two subclasses did not sweep within their *585ambit the “nondependents” who were ultimately included in the Wilson action. The fifty-three (53) individuals who later comprised the Wilson class three were, in March of 1981, “properly characterized as parties” to the Neyhard action. We find, therefore, that the appellant bears a duty to “fairly and adequately assert and protect the interests of the class” he represents, Pa.R.Civ.P. 1702(4), inclusive of the Wilson class three members. As a representative of the individual members of class three, the appellant’s legally enforceable interest in the Wilson action was sufficient to satisfy Rule 2327(4).
“[T]he exact boundaries of the ‘legally enforceable interest’ limitation ... are not clear.
It owes its origin to the desire of the courts to prevent the curious and meddlesome from interfering with litigation not affecting their rights. The result is a flexible, although uncertain rule....”
Pennsylvania Railroad Co. v. Hughart, 422 Pa. 615, 222 A.2d 736, 738 (1966).
The appellant need not have been one of the individuals mistakenly included in the Wilson action to be possessed of a legally enforceable interest. Such an argument ignores the appellant’s representational status. Further, the Wilson class three members were previously parties to the pre-certification Neyhard action represented by the appellant. The appellant was, by no means, simply “curious and meddlesome” in attempting to intervene in the Wilson action. Therefore, the lower court improperly denied the appellant’s petition to intervene.10
*586Order of June 9, 1982, denying the appellant’s petition to intervene, is reversed. Order of June 9, 1982, dismissing the appellant’s objections to the proposed class action settlement, is not reached. Order of June 10, 1982 is not reached. Order of June 25, 1982 is not reached.
DEL SOLE, J., files dissenting opinion.. In addition to these three orders, the appellant’s notice of appeal, filed on July 7, 1982, evidenced an intent to appeal a fourth order entered on June 25, 1982. However, no arguments relating to this order have been presented to us and therefore we will consider the issue waived.
. 40 P.S. § 1009.101 et seq.
. [40 P.S. § 1009.103]
. But see Freeze v. Donegal Mutual Insurance Company, 504 Pa. 218, 470 A.2d 958 (1983).
. 40 P.S. § 1009.103.
. State Farm faces more than eleven hundred (1,100) potential claims for work loss benefits on behalf of decedents who left no dependent “survivors". Neyhard v. State Farm, Defendant’s Answers to Interrogatories, paragraph 5 and 6.
. On June 10, 1982, the court entered orders approving the overall settlement as fair, reasonable, and adequate. However, due to the possibility of the appellant’s appeal, class three was severed from classes one and two for separate disposition. The appellant has, at no time, raised objections to the proceedings or settlements involving classes one and two.
. The absence of a grant of the appellant's petition to intervene created confusion as to whether or not the appellant’s objections were properly before the lower court. This is apparent in the record of the settlement hearing held on June 9, 1982. Counsel for the appellant requested as follows:
MR. SHUSTER: Your Honor, please, just for clarification of the record, in light of your severance, I would request that Your Honor approve the petition for intervention since Your Honor has overruled the objections so that we have a standing to proceed.
THE COURT: Does anybody have any objections to this intervention?
MR. REATH: Your Honor, we do.
THE COURT: The real problem that we have is that we have a case, at least in my opinion, which is against you; however, I think that you should have a ruling on the petition to intervene so you can take an appeal on that case, [petition denied]
N.T. Settlement Hearing, June 9, 1982, at 38-39.
Having denied the appellant’s petition to intervene, the appellant was without standing to raise objections to the proposed settlement. The lower court improperly entertained, and improperly ruled upon the apparent merits of, the appellant’s objections. In analogous situations, courts have held:
A third person cannot appear and file preliminary objections in an action to quiet title without first intervening and becoming a party. Only by intervention can the third person acquire standing. No stranger may be permitted to file an answer to a complaint unless he has first intervened in the action and became a party. An outsider cannot move to strike off or to open a judgment until he has first intervened. (Footnotes omitted).
Goodrich-Amram 2d § 2327:1.
If a petitioner for intervention has no other adequate means of asserting his rights, the denial of his/her petition is a final and appealable order. See Richard Held Builders, Inc. v. A.G. Allebach, Inc., 266 Pa.Super. 101, 403 A.2d 113 (1979). Given the specific nature of the appellant’s alleged status as representing the individual members of class three in Wilson, the denial of the appellant’s petition to intervene in the Wilson action foreclosed the only means by which the appellant could assert his claim. This was an appealable order.
In light of the foregoing analysis, our review of the instant case will be confined to a determination of whether the lower court acted properly in denying the appellant’s petition to intervene. We therefore do not reach the merits of the appellant’s challenge to the June 9, 1982 dismissal of his objections to the proposed settlement or the *583merits of the appellant’s related challenge to the June 10, 1982 approval of the settlement as to subclass three.
. Pa.R.Civ.P. 1710(d)
. Under Pa.R.Civ.P. 2329(2), a court may refuse an application for intervention despite the satisfaction of Rule 2327, if “the interest of the petitioner is already adequately represented.” See Straud v. Harper, 66 Mont.C.Rep. 313, 81 Pa. D & C 233 (1950). Since it may be argued that Wilson was already adequately representing the interests of the appellant in the Wilson action, we feel it is necessary to redress this contention. We do so simply by making reference to the findings of the lower court in the opinion filed following that court’s original class certification hearing, Wilson v. State Farm Mutual Insurance Co., 103 Dauph.C.Rep. 25 (1981). At that time, the court refused to certify as a subclass the claims of survivors whose dependency was disputed. The court stated, “We are unable to conclude with certainty that the *586plaintiff herein [Wilson] truly represents the interests cf said ‘other’ survivors.” Id. at 28.