The deciding court may set aside a final judgment on a motion under Federal Rule of Civil Procedure 60(b)(3) if it is a result of fraud, “misrepresentation, or misconduct by an opposing party.” A court may also provide relief from a judgment if it is a result of a “fraud on the court.” Fed. R.Civ.P. 60(d). “The inherent power of a federal court to investigate whether a judgment was obtained by fraud, is beyond question.” Universal Oil Prods. Co. v. Root Ref. Co., 328 U.S. 575, 580, 66 S.Ct. 1176, 90 L.Ed. 1447 (1946). The “proper forum in which to assert that a party has perpetrated a ‘fraud on the court’ is the court which allegedly was a victim of that fraud.” Wilson v. Comm’r, 309 Fed.Appx. 829, 833 (5th Cir.2009). Nguyen, however, did not challenge the final judgment in his initial suit, nor did he file a Rule 60(b) motion.
“[Tjhe standard for fraud on the court is demanding: ‘Generally speaking, only the most egregious misconduct, such as bribery of a judge or members of a jury, or the fabrication of evidence by a party in which an attorney is implicated, will constitute a fraud on the court.’ ” Ballew v. U.S. Dep’t of Justice, 244 F.3d 138 (5th Cir.2000). Fraud is “never presumed” and “must always be proven by clear and convincing evidence.” Saenz v. Kenedy, 178 F.2d 417, 419 (5th Cir.1949). All Nguyen has offered to support fraud is a vague statement that he did not agree to the motion to dismiss with prejudice. That is insufficient. The district court correctly concluded that the previous judgment could not be undone.
Given the finality of the previous judgment, we turn to the issue of res judicata. Claim preclusion “bars the litigation of claims that either have been litigated or should have been raised in an earlier suit.” Test Masters Educ. Servs., Inc. v. Singh, 428 F.3d 559, 571 (5th Cir.2005). Claim preclusion exists where
(1) the parties in the subsequent action are identical to, or in privity with, the parties in the prior action; (2) the judgment in the prior case was rendered by a court of competent jurisdiction; (3) there has been a final judgment on the merits; and (4) the same claim or cause of action is involved in both suits. If a party can only win the suit by convincing the court that the prior judgment was in error, the second suit is barred.
Duffie v. United States, 600 F.3d 362, 372 (5th Cir.2010) (internal citations omitted).
The first prong is satisfied: Nguyen and BOA were the only parties in both suits. The second prong is also met: The district court had diversity jurisdiction. The third prong is satisfied as well: The parties submitted an agreed motion to dismiss with prejudice, the district court entered an order dismissing with prejudice, and Nguyen neither challenged the judgment nor tried to reopen the case. And, as we concluded above, the judgment will not be overturned as fraudulent.
Finally, the fourth prong is satisfied. Six of the seven causes of action that Nguyen urges are identical to those in the original suit. The only addition is breach of fiduciary duty, which is related to and could have been brought in the initial suit. Both actions arise out of the “the same nucleus of operative facts”: the foreclosure and foreclosure proceedings regarding Nguyen’s house.
See Southmark Corp. v. Coopers & Lybrand (In re Southmark Corp.), 163 F.3d 925, 934 (5th Cir.1999) (emphasis omitted). They thus involve the same claim, so claim preclusion bars this suit, and the district court properly dis