The issue in this ease is one of subject matter jurisdiction. The question is whether the amount in controversy in this diversity action exceeds $50,000, as required by 28 U.S.C. § 1332. 1 Finding that the amount in *182 controversy did not satisfy the statutory requirement at the inception of the action, we reverse the district court’s judgment on the merits and remand with directions to dismiss.
I.
The plaintiffs-appellants brought this action to recover royalties allegedly due from the defendant under an assignment of a “working interest” in an oil and gas well in Clay County, Kentucky. The defendant is a Florida corporation and the only basis for federal court jurisdiction is diversity of citizenship. The complaint set out the diverse citizenship of the plaintiffs and the defendant, followed by this statement:
To the best information, knowledge, and belief of the Plaintiffs and/or their undersigned counsel the amount in controversy between the Parties hereto exceeds Fifty Thousand Dollars ($50,000).
Along with their timely answer, the defendant filed a motion to dismiss claiming a jurisdictional defect in that the true amount in controversy was in fact less than $10,000, not more than $50,000.
The district court denied the motion to dismiss without giving any statement of reasons. The case followed a rather tortuous path thereafter and finally concluded with entry of summary judgment in favor of the defendant. The plaintiffs filed a notice of appeal, and all parties waived oral argument. Thus, the appeal was submitted on the district court record and the briefs.
The defendant did not renew its motion to dismiss following judgment, or in this court. However, the plaintiffs made the following statement in their opening brief:
Because the case was ruled on below following cross motions for Summary Judgment and prior to any extensive discovery, it was not discovered until this appeal that the amount in controversy is actually less than $50,000.
II.
Although the defendant has not raised the issue of jurisdictional amount on appeal, this court has a duty to determine whether the amount in controversy satisfies the statutory requirement.
Clark v. Paul Gray, Inc.,
If a claim of the required jurisdictional amount is apparently made in good faith, that claim controls unless it appears “to a legal certainty that the claim is really for less than the jurisdictional amount.”
St. Paul Mercury Indemnity Co. v. Red Cab Co.,
These cases illustrate the rule that if a good-faith claim of sufficient amount is made in the complaint, subsequent events
*183
that reduce the amount below the statutory requirement do not require dismissal. A distinction must be made, however, between subsequent events that change the amount in controversy and subsequent revelations that, in fact, the required amount was or was not in controversy at the commencement of the action. Thus, while 28 U.S.C. § 1653 permits amendments of a complaint to cure defective
allegations
of jurisdiction, it does not permit amendments to remedy actual jurisdictional defects.
Newman-Green,
III.
The present ease is factually different from those previously decided by this court and those we have discovered from other courts of appeals. Here the jurisdictional defect was not disclosed by an amended complaint, by application of a legal defense following discovery, or by evidence adduced at a trial. Rather, the plaintiffs revealed in their brief filed in this court that “the amount in controversy is actually less than $50,000.” Since no subsequent event occurred to reduce the amount in controversy, this can only mean that the plaintiffs’ claims never satisfied the jurisdictional requirement.
We have located only one ease with similar facts. In
American Mutual Liability Ins. Co. v. Campbell Lumber Mfg. Corp.,
We believe the present case is subject to the same analysis. No subsequent event changed the amount in controversy; rather, subsequent discovery of the true amount led to the plaintiffs’ commendable disclosure to this court. Because there was never more, than $50,000 in controversy, the district court lacked subject matter jurisdiction over this action.
The judgment of the district court is reversed. The case is remanded to the district court with instructions to dismiss at the plaintiffs’ costs. Inasmuch as the defendant did not raise the jurisdictional issue in this court and give this court an opportunity to dispose of the case by motion, no costs are allowed on appeal. All parties will bear their own costs here.
Notes
. Section 1332 provides, as relevant here:
(a) The district courts shall have original jurisdiction of all civil actions where the matter in controversy exceeds the sum or value of $50,000, exclusive of interest and costs, and is between—
(1) citizens of different States;
