
    Barbara NEWMAN, Plaintiff-Appellant, v. TRIBAL CASINO GAMING ENTERPRISE, Defendant-Appellee.
    No. 18-1045
    United States Court of Appeals, Fourth Circuit.
    Submitted: March 13, 2018
    Decided: March 16, 2018
    Barbara Newman, Appellant Pro Se. Patrick McQuillan Aul, COZEN O’CON-NOR, Charlotte, North Carolina, for Ap-pellee.
    
      Before NIEMEYER, KING, and WYNN, Circuit Judges.
   Unpublished opinions are not binding precedent in this circuit.

PER CURIAM:

Barbara Newman appeals the district court’s order dismissing her action seeking relief under the Age Discrimination in Employment Act, see 29 U.S.C. §§ 621-634 (2012), for lack of subject matter jurisdiction on the basis of tribal sovereign immunity. The district court referred this case to a magistrate judge pursuant to 28 U.S.C. § 636(b)(1)(B) (2012). The magistrate judge recommended that relief be denied and advised Newman that failure to file timely objections to this recommendation could waive appellate review of a district court order based upon the recommendation.

The timely filing of specific objections to a magistrate judge’s recommendation is necessary to preserve appellate review of the substance of that recommendation when the parties have been warned of the consequences of noncompliance. Wright v. Collins, 766 F.2d 841, 845-46 (4th Cir. 1985); see also Thomas v. Arn, 474 U.S. 140, 106 S.Ct. 466, 88 L.Ed.2d 435 (1985). “[T]o preserve for appeal an issue in a magistrate judge’s report, a party must object to the finding or recommendation on that issue with sufficient specificity so as reasonably to alert the district court of the true ground for the objection.” Makdessi v. Fields, 789 F.3d 126, 131 (4th Cir. 2015) (internal quotation marks omitted); see Martin v. Duffy, 858 F.3d 239, 245 (4th Cir. 2017). Newman’s objections were nonspecific and did not address the issue of trial sovereign immunity, the sole basis for the magistrate judge’s recommendation. Thus, she has waived appellate review of that dispositive issue by failing to file specific objections after receiving adequate notice.

Additionally, on appeal, we confine our review to the issues raised in the Appellant’s brief. See 4th Cir. R. 34(b). Newman’s informal brief also fails to address the issue of tribal sovereign immunity. As she does not challenge the basis for the district court’s disposition, Newman has forfeited appellate review of the court’s order. See Jackson v. Lightsey, 775 F.3d 170, 177 (4th Cir. 2014) (“The informal brief is an important document; under Fourth Circuit rules, our review is limited to issues preserved in that brief.”).

Accordingly, we affirm the judgment of the district court. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before this court and argument would not aid the decisional process.

AFFIRMED  