delivered the opinion of the Court.
We noted probable jurisdiction in this case,
The case was first heard by us at the 1969 Term, and was thereafter set for reargument at the present Term.
I
The Georgia statutory scheme under which this case was initiated, Ga. Code Ann. §§ 61-301 to 61-305 (1966), and § 61-306 (Supp. 1969), operated in the following manner. A landlord seeking summary eviction could file an affidavit in a local court, alleging that the tenant, *146 for one or more statutorily enumerated reasons, was unlawfully holding possession of the premises and had refused the landlord’s demand to relinquish possession. (§ 61-301.) When such an affidavit had been filed the local judicial officer was required to issue a “warrant or process” to the sheriff directing him to “deliver to the owner” the premises described in the affidavit. (§ 61-302.) The sheriff was to give the tenant four days’ notice before executing the dispossessory warrant. (§61-306 (Supp. 1969).)
The tenant could prevent immediate eviction only by filing a counter-affidavit, alleging one of several specified defenses and accompanied by a surety bond “for the payment of such sum, with costs, as may be recovered against him on the trial of the case.” (§ 61-303.) Only if the tenant followed these procedures was he then entitled to a trial on the issues raised by the affidavits. (§ 61-304.) Against this background, § 61-305 provided:
“If the issue specified in the preceding section shall be determined against the tenant, judgment shall go against him for double the rent reserved or stipulated to be paid, or if he shall be a tenant at will or sufferance, for double what the rent of the premises is shown to be worth . . .
In the case before us, appellants Sanks and Momman were served with dispossessory warrants on May 21, 1968, and July 17, 1968, respectively (App. 3, 18), and then applied for (App. 5, 20), and eventually obtained (App. 24 — 39) from the Civil Court of Fulton County a “rule nisi” permitting appellants to remain in possession of their respective premises pending resolution of the factual issues raised by their applications, so long as they timely paid their rent into court during the pendency of the litigation. Both the bond-posting
*147
requirement (§61-303) and the double-rent damages measure (§ 61-305) were declared unconstitutional and, hence, inapplicable to these eviction proceedings. (App. 27-39.) On an interlocutory appeal, the trial court’s constitutional declarations were set aside by the Supreme Court of Georgia,
II
Since we noted probable jurisdiction the posture of this case has shifted dramatically. Both Mrs. Momman and Mrs. Sanks have removed from the premises originally sought to be recovered by their landlords. In addition, the Georgia General Assembly has repealed virtually the entire statutory scheme that has governed this litigation from its inception and replaced it with a new one, effective July 1, 1970, that contains neither the bond-posting nor double-rent requirement. 1 Ga. Laws 1970, pp. 968-972, Ga. Code Ann. §§ 61-302 to 61-305 (Supp. 1970). Under the new law, dispossessory actions will still be commenced by the landlord’s execution of an affidavit. Now, however, this merely compels the local judicial officer to cause the tenant to be summoned to a hearing (§ 61-302), and the tenant can retain possession and force a trial of any defenses he may wish to raise simply by answering the affidavit, orally or in writing, at the hearing. (§ 61-303.) Expedited trials are encouraged. If the litigation has not been concluded within a month of the execution of the landlord’s affidavit, the tenant may retain possession by paying into court all rent as it becomes due, in addition to any rent that was due but not paid prior to issuance of the summons. (§§ 61-303, 61-304.) If the landlord ultimately prevails, his monetary damages, if any, are to be based on the actual, not double, rent found due. (§ 61— 305.) Similarly, the tenant may, in effect, stay execu *148 tion of the dispossessory warrant pending appeal of an adverse determination simply by paying rent, as it accrues, into the court. (§ 61-306.)
Ill
The crux of this controversy from its inception has been appellants’ insistence that they, not their alleged landlords, had the right to lawful possession of the premises in dispute and their demands that they be permitted to remain in possession pending the outcome of the litigation. 1 With appellants’ voluntary removal from the premises this aspect of the case is clearly moot. We have been apprised of no basis in the statutes or case law for assuming that were this Court now to hold Mrs. Sanks and Mrs. Momman were constitutionally entitled to proceed in the trial court without first posting a double-rent bond, they could then seek a decree under the statutes here at issue returning them to possession of the premises. The repealed statute spoke only of enabling a tenant already in possession to contest forcible eviction upon posting a bond. Indeed, neither appellants nor appellees — all of whom resist the suggestion that the case as a whole is moot — contend that this aspect of it is not moot. There is thus no reason to believe that, on remand, either appellant, if successful in this Court, could litigate, in the context of any proceeding that might conceivably be governed by any of the provisions of these repealed Georgia statutes, a claim to be put in possession of the premises she originally occupied.
In support of the continued justiciability of the case, appellants rely upon a subsidiary aspect of this controversy which they claim remains alive. Were this *149 Court to affirm the Georgia Supreme Court on the merits, the case would presumably be remanded to the trial court in accordance with the Georgia Supreme Court’s mandate. There, argue appellants, those who initially procured the dispossessory warrants might then move for entry of a judgment for double damages as provided in former § 61-305. Appellants fear that such a judgment might automatically be entered because their removal from the premises might be construed as effectively conceding their lack of substantive defenses or that, even if they are still technically entitled to raise defenses, appellants’ ability to do so will be conditioned on first posting the bond. Such a result is possible only if a number of factors coalesce. First, the original moving parties, the alleged lessors, would have to decide to seek such damages from these relatively impecunious appellants. Second, the Georgia courts would have to rule that such request for damages should be adjudicated under the repealed statutes. Third, it would also be necessary for the state courts to hold that those statutes contemplated awarding double rent in the circumstances here and (see infra) on a basis that renders material the bond-posting provision.
Beyond all this, the original posture of this case has been further upset by the apparent fact that prior to moving out, and in compliance with the order of the trial court, appellants paid their rent money into the court’s registry as it became due, money that still remains on deposit there. Tr. of Oral Rearg., Nov. 18, 1970, pp. 10-11, 26.
With the case in this Court thus so reoriented, it is impossible for us to predict whether and to what extent our adjudication of the issues originally presented would now be material to any further litigation that might ensue on remand. Whether the original initiating,parties will seek double damages is a matter wholly beyond *150 the control of this, or any other, court. Whether the existence of funds in the registry of the trial court will necessitate an adversary proceeding to redistribute them and, if so, whether that proceeding would be governed by the repealed statutes which, on their face, do not even remotely speak to this problem, are matters of pure conjecture. Because the former statutes provided for double damages only where “the issue . . . [is] determined against the tenant” (former § 61-305) and provided for joinder of issue only where a double-rent bond had first been posted (former §§ 61-303, 61-304), we are quite unable to say whether the Georgia courts would nevertheless hold this language sufficiently elastic to permit a claim for double damages where eviction was arrested by court order rather than a bond, yet insufficiently flexible to permit simultaneous waiver of the bond-posting requirement before adjudication of such a claim. Nor can we predict whether and to what extent repeal of the former statutory scheme would, on remand, be held to alter any of the conclusions respecting it which the Georgia courts might otherwise adopt in this context. 2 All these issues, so far as it appears, would be matters of first impression for the Georgia judiciary.
IV
Given this imponderable legal tangle, involving, as it does, purely matters of state law, we perceive no other responsible course for this Court than to decline, at this stage, to adjudicate the issues originally presented. We
*151
do not rest this conclusion on a determination that the case is moot. Conceivably, appellants may on remand be subjected to the double-rent or bond-posting requirements of the former statutes. But it has always been a matter of fundamental principle with this Court, a principle dictated by our very institutional nature and constitutional obligations, that we exercise our powers of judicial review only as a matter of necessity. As said in
United States
v.
Petrillo,
Moreover, even were the constitutional issues certain to arise below we cannot foretell the context in which they will appear. Possibly the double-rent provision will be successfully invoked, but not the bond-posting requirement. Similarly, if the latter is held applicable, we would at this stage be required to adjudicate, in advance of that fact, its validity as a precondition not to resisting summary eviction, which is its normal and clearly intended use, but to contesting a claim for damages only. The operative competing constitutional considerations, particularly the nature and scope of the State’s interest in imposing such a barrier to litigation, may well be significantly different depending on the principal purposes for which the bond is required. Yet, given the debilitated state of this lawsuit, we could address only the subsidiary problem — and this in a legal context where we would not know whether that problem will ever arise.
The principle of prudent restraint we invoke today is
*152
nothing new, although, happily, it has not frequently proved necessary to dispose of appeals on this basis.
United States
v.
Fruehauf,
In the case now before us subsequent events have produced similar consequences. The focus of this lawsuit has been completely blurred, if not altogether obliterated, and our judgment on the important issues involved is potentially immaterial. Indeed, the instant case is obviously more compelling than Fruehauf, since this one presents an issue of constitutional, not statutory, interpretation.
*153
Similarly, in
Rescue Army
v.
Municipal Court of Los Angeles,
In short, resolution by this Court at this time, of the issues originally raised by appellants would not be appropriate. We leave ourselves completely free, of course, to review these issues should appellants’ fears that they will be adversely affected by the repealed statutes subsequently be confirmed by proceedings in the Georgia courts.
Accordingly, the appeal will be dismissed and the case remanded to the Supreme Court of Georgia.
It is so ordered.
Mr. Justice Black concurs in the judgment of the Court dismissing this appeal but does so specifically on the ground that the case is now moot.
Notes
Mrs. Sanks intended to contest the dispossessory warrant on the ground that she is not, in fact, the tenant of the person seeking to evict her. App. 5.
Georgia has a statutory policy disapproving the retroactive application of new statutes. Ga. Code Ann. § 102-104 (1968). However, the statute expressly distinguishes “[l]aws looking only to the remedy or mode of trial.” Conceivably, this case might be held to fall within that exception. Moreover, we cannot foretell whether a subsequent motion for double damages would be treated as, in effect, a new lawsuit filed well after passage of the new Act.
