OPINION OF THE COURT
Wе have before us the appeal of Marsha Dobson who was convicted by a jury of three counts of mail fraud under 18 U.S.C. § 1341. Dobson argues, inter alia, that she is entitled to a new trial because the District Court failed to properly charge the jury with regard to the “culpable participation” component of the alleged fraudulent scheme. 1
I.
On September 25, 2002, a federal grand jury returned a ninety-nine count Indica *234 ment charging Marsha Dobson and nine other individuals — including Dobson’s husband, Larry Dobson — with various counts of conspiracy, mail fraud, and money laundеring. Dobson was charged in that Indictment with one count of conspiracy to commit mail fraud, three counts of substantive mail fraud, and three counts of aiding and abetting mail fraud.
Prior to trial, three of Dobson’s co-defendants entered guilty pleas. In addition, the District Court severed Larry Dobson’s case from that of his wife and the other defendants in order to avoid forcing him to choose “between the right to testify in one’s own defense and the right not to testify adversely against a spouse.... ”
United States v. Dobson,
No. Crim. 02-616-06,
The evidence presented at trial, viewed in the light most favorable to the United States as the verdict winner, showed the following: Dobson had been a salesperson for Surplus Agents of America (“SAA”), which held itself out as being engaged in the business of locating and reselling surplus and liquidated merchandise, such as clothing, toiletries, and household items, from brand-name manufacturers who were unable to sell such goods through the regular channels of distribution. SAA lоcated individuals who paid a fee to become a SAA “broker” on SAA’s representation that, as brokers, they would be able to purchase discounted brand-name merchandise and resell it to third parties at a substantial profit.
After SAA ceased to exist in December 1994, William Kenneth Garrett, one of its principal managers, moved the operation to Fort Washington, Pennsylvania and established a similar business under the name Universal Liquidators (“UL”). At trial, Garrett, who had previously entered a plea of guilty, testified that due to the similarity between the UL and SAA operations, he had hired many of SAA’s former employees, including Dobson, to work at UL.
As a UL salesperson, Dobson attended trade shows around the country where she marketed UL broker positions. In her sales presentations, Dobson told potential brokers that they could buy into UL’s brokerage opportunity for a one-time payment of approximately $5,000.00. In return, the brokers were promised training, the materials they would need to start their business, and lists of manufacturers and distributors who would allegedly sell them the brand-name merchandise at prices substantially below market value which they could resell to the public at a profit.
Dobson used UL brochures and written materials in presenting her sales pitch about the company. Among other things, these UL materials represented that UL had relationships with various manufacturers who would supply brand-named merchandise to UL brokers at deep discounts. In fact, as Garrett himself testified at trial, UL had no relationships with any of the brand-name manufacturers as claimed in its sales materials. He also admitted that, contrary to its brochures and written materials, UL did not actually have any mechanisms or methods whereby it could obtain for its brokers the deeply discounted brand-name merchandise. 2
*235 The trial evidence also showed that, in marketing the UL “opportunity” to prospective brokers, Dobson was not always truthful about the scope of her involvement with UL. Most pertinently, Dobson did not tell potential brokers that she was an employee of UL whose job it was to sell broker positions; instead, she told them that she herself was a broker. 3 Indeed, according to the testimony of one trade-show attendee, Dobson held herself out as a very successful UL broker who, among other things, had made enough money to buy “a horse ranch in Montana.” App. at 170. Dobson further regaled prospective brokers with stories, examples, and details regarding the deals that she had supposedly negotiated for sizeable profits. None of this was true.
In addition to the falsehoods and misstatements made by Dobson, she used the false and fraudulent UL brochures and written materials in her presentation. Throughout the trial, Dobson vigorously denied both that she knew these materials to be untrue and that she knew of the overall fraudulent nature of UL’s business plan.
The strongest evidence in the record that Dobson knew that UL and SAA were completely fraudulent operations was provided by Carol Brothers. Brothers testified that she had worked for SAA, first as a salesperson and later in SAA’s offices. She testified that she quit SAA and reported its activities to federal law enforcement authorities when SAA’s management “promoted me, moved me into the office and I realized everything that I was saying in the fiеld, all of us were saying in the field[,] was not factual.” App. at 279. Brothers further testified that after she had left SAA, she happened to encounter Dobson at a trade show and took the opportunity to tell Dobson that SAA was a scam and that what she was “saying in the field was a lie.” App. at 283. To discredit Brothers’ testimony, Dobson’s attorneys brought out evidence during cross-examination suggesting that Brothers believed SAA owed her over $100,000.00 in back commissions, that she had left the organization on poor terms, and that only after she left did she report SAA to the authоrities.
At the close of the prosecution’s case, the District Court granted motions for judgment of acquittal under Fed.R.Crim.P. 29 on all counts pending against Griffith, Lange, Beam, and Schall. It further entered judgments of acquittal on the conspiracy counts pending against Massara and Dobson. In sum, after the Fed. R.Crim.P. 29 stage, the only charges that remained for the jury’s resolution were the substantive mail fraud counts pending against Massara and Dobson.
Following the defense cases, jury instructions, and deliberations, the jury convicted both Massara and Dobson. Specifically as to Dobson, the jury convicted her of the three mail fraud counts charged in Counts Twenty-Eight through Thirty of the Indictment. Following this verdict, the District Court granted Dobson’s request for the appointment of new counsel.
Dobson’s new counsel filed post-verdict motions for acquittal, see Fed.R.Crim.P. 29(c), and new trial, see Fed.R.Crim.P. 33, both of which the District Court denied following oral argument. On June 18, 2004, the District Court sentenced Dobson to three concurrent terms of twenty-four months incarceration to be followed by *236 three years of supervised release. The District Court further ordered Dobson to pay restitution.
Dоbson filed this timely appeal in which she challenges the District Court’s jury instruction on the elements of mail fraud and the sufficiency of the evidence presented by the United States to support the guilty verdict on Count Thirty. Dobson further seeks review of her sentence in light of
Blakely v. Washington,
II.
Dobson argues that the District Court erroneously instructed the jury on the substantive elements of the crime of mail fraud. 5 Specifically, she argues that the District Court’s instruction failed to includе the “culpable participation” requirement for mail fraud as enunciated in this court’s decisional law.
Although “[w]e generally review jury instructions for abuse of discretion,”
Walden v. Georgia-Pacific Corp.,
Under the plain error standard, before an appellate court can correct an error not raised at trial, it must find: (1) an error; (2) that is plain; and (3) that affected substantial rights.
United States v. Olano,
Under the requisite Fed. R.Crim.P. 52(b) analysis, we must first determine whether the District Court’s instruction on the elements of mail fraud constituted legal error — a necessary predicаte of plain error. The substantive elements of mail fraud under 18 U.S.C.
*237
§ 1341 are: (1) the existence of a scheme to defraud; (2) the use of the mails — ■ whether the United States Postal Service or a private carrier — -in furtherance of the fraudulent scheme; and (3) culpable participation by the defendant, that is, participation by the defendant with specific intent to defraud.
United States v. Copple,
Now, what are the essential elements of the charge of mail fraud.
They are as follows:
You must find that the Government has proved each one оf these elements beyond a reasonable doubt....
One, the defendant knowingly devised or participated in a scheme to defraud, or to obtain money or property by materially false or fraudulent ] pretenses, misrepresentations, or promises.
Two, the defendant acted with specific intent to defraud;
And, three, in advancing, furthering, or carrying out the scheme, the defendant used the mails or [a] private or commercial interstate carrier, or caused the mails for private or commercial interstate carrier to be used.
App. at 472.
Dobson argues that this instruction failed to articulate the “culpable participation” requirement needed to support a mail fraud conviction. In so arguing, she relies heavily on our decision in
United States v. Pearlstein,
In
Pearlstein,
we held that in a mail fraud case it is not sufficient for the United States to prove merely that a defendant participated in a fraudulent scheme; rather, it must show that the defendant did so knowingly and “in furtherance of the illicit enterprise.”
Id.
at 545;
see also Genty v. Resolution Trust Corp.,
At one time or another, all the defendants exaggerated their role in the ... operation and made false statements *238 concerning their own business backgrounds. However, such misrepresentations did nоt relate to the essential feature of their presentations[,] the sale of ... [the bogus] distributorships[,] and can hardly be construed as fraudulent.
The charge did not convey this essential aspect of the knowledge element of the fraud charged in the Indictment. The District Court’s instruction nowhere advised the jury that it could convict only on finding that Dobson in fact knew of UL’s fraudulent scheme. It directed thе jury to determine “whether the defendant knowingly devised or participated in a scheme to defraud.” App. at 472. This could have referred either to culpable participation in UL’s fraudulent scheme {i.e., the selling of brokerages that she knew to be worthless) or to Dobson’s questionable sales tactics {e.g., her claim that the UL opportunity allowed her to buy “a horse ranch in Montana”). Stated otherwise, the language of the charge easily, but erroneously, encompassed the possibility that Dobson’s own misrepresentations, without knowledge of UL’s broader illicit purpose, could constitute her creation of, or participation “in a scheme to defraud, or to obtain money or property by materially false or fraudulent! ] pretenses, misrepresentations, or promises,” App. at 472, and hence guilt under 18 U.S.C. § 1341 as charged in the Indictment.
As in
Pearlstein,
this case presents two layers of potential fraud or misrepresentation that do not necessarily interconnect: (1) Dobson’s dubious sales presentations; and (2) the fraudulent UL scheme charged in the Indictment.
Pearlstein
is clear in teaching that proof of Dobson’s participation in the latter is necessary to the prosеcution’s case and that proof of the former is only relevant to the extent it may constitute circumstantial evidence of the latter.
See Pearlstein,
The United States raises several arguments in an attempt to show that the District Court’s charge was not in error. First, the United States points to this court’s formulation of the elements of mail fraud in two
post-Pearlstein
cases,
United States v. Pharis,
It is true that in
Pharis
we did not explicitly articulate a culpable participation requirement but there was no need to do so in that case. There was only one “layer” of potentially misleading or fraudulent activity to be concerned with — that of the overarching scheme. Indeed, the prosecution’s theory in
Pharis
was that the defendants themselves directly devised the
*239
fraudulent scheme at issue.
Phans,
Next, the United States reminds us that we must consider the jury instructions as a whole and argues that the District Court’s instructions respecting the meaning of a scheme to defraud and intent to defraud required the jury to mаke a finding of culpable participation in order to return a guilty verdict. We agree that “a single instruction to a jury may not be judged in artificial isolation, but must be viewed in the context of the overall charge.”
Cupp v. Naughten,
In sum, we conclude that the District Court’s instruction was in error. We must nonetheless determine whether this error was “plain.”
Haywood,
In order to be “plain” an error must be “clear” or “obvious.”
Olano,
Because the error was plain, we must next decide whether it affected Dobson’s substantial rights. Fed. R.Crim.P. 52(b);
see also Olano,
It is settled that due process requires the prosecution to prove beyond a reasonable doubt every fact necessary to establish the offense as charged against the defendant.
In re Winship,
As propounded by the District Court, however, the instructions at issue made it possible for the jury to have convicted Dobson without finding beyond a reasonable doubt that she culpably participated in the UL schеme. To be sure, the Government presented evidence from which the jury could have concluded that Dobson knew of the fraudulent nature of the UL scheme. However, this does not preclude a finding of prejudice for purposes of plain error.
See Xavier,
We conclude that the error trenched on Dobson’s substantial rights because there is a “reasonable likelihood” that the jury applied it in a manner that resulted in an unconstitutional conviction.
See Rosa,
Of course, even when an error is plain and injurious to substantial rights, we should nonetheless decline to correct it unless “the error ‘seriously affect[ed] thе fairness, integrity or public reputation of [the] judicial proceedings.’ ”
Olano,
507
*241
U.S. at 732,
We conclude that such a miscarriage has taken place in the present case. We have no means of knowing on what basis the jury convicted Dobson of mail fraud: it could have done so properly on the basis of some direct or circumstantial evidence that Dobson knew and participated in the overall fraudulent UL scheme (e.g., Brothers’ testimony), or it could have done so on the basis of the abundant evidence of Dobson’s dubious sales presentations that, while no doubt unsavory, are insufficient to support the mail fraud charges alleged in the Indictment. Because a conviction based on an incomplete chargе taints the reputation of the judicial process, we will vacate Dob-son’s conviction and remand the matter for a new trial. 10
III.
As noted above, Dobson has also challenged the sufficiency of the evidence with respect to her conviction for Count Thirty of the Indictment. Although we will reverse Dobson’s conviction due to the jury instruction error, we must resolve this issue so that the parties know on which counts they may proceed at retrial.
The evidence at trial showed that, throughout her tenure at UL, Dobson corresponded with UL’s home office and otherwise conducted her business through the United States mail and private carriers. Count Thirty references “[a] Federal Express package, shipped from ... Cordova, TN ... from Marsha Dobson, Universal Liquidators ... to Kelly, Universal Liquidators ... Fort Washington, PA.” App. at 115. Dobson argues that because the prosecution introduced no evidence with regard to the contents of this mailing, it presented insufficient evidence to support the conviction on Count Thirty.
We find Dobson’s argument unconvincing. The jury was presented with evidence that UL was, thrоugh-and-through, a completely fraudulent enterprise. Once the United States shows a fraudulent scheme, the mailing requirement of 18 U.S.C. § 1341 is satisfied by a showing that the defendant used the mail in furtherance of that scheme. Stated otherwise, in order for a particular mailing to support a mail fraud conviction, all that is necessary is that such a mailing have been incidental to a necessary aspect of the scheme or have been “sufficiently closely related to the scheme.”
United States v. Tiller,
IV.
For the reasons set forth, we will reverse Dobson’s convictions and remand to the District Court for additional proceedings consistent with this opinion. 12
Notes
. The District Court had jurisdiction pursuant to 18 U.S.C. § 3231; this court has jurisdiction under 28 U.S.C. § 1291.
. Garrett also testified that he paid people, whom he called "singers,” App. at 317, to serve as false references: potential brokers would call these individuals who would pose as successful brokers and give favorable reports of their experience with UL in an at *235 tempt to persuade the potential brokers to remit payment and join UL.
. Garrett testified that Dobson received a commission of 25% on her sales of brokerages.
. The parties filed their appellate briefs before the Supreme Court announced its decision in
United States v. Booker,
543 U.S. -,
. In pertinent part, the mail fraud statute reads:
Whoever, having devised or intending to devise any scheme or artifice to defraud, or for obtaining money or property by means of false or fraudulent pretenses, representations, or promises ... for the purpose of executing such scheme or artifice or attempting so to do, places in any post office or authorized depository for mail matter, any matter or thing whatever to be sent or delivered by the Postal Service, or deposits or causes to be deposited any matter or thing whatever to be sent or delivered by any private or commercial interstate carrier, or takes or receives therefrom, any such matter or thing ... shall be fined under this title or imprisoned not more than 20 years, or both.
18 U.S.C. § 1341.
. Although it was presented in a different posture,
Pearlstein
involved a mail fraud issue strikingly similar to the one presently at bar. The defendants in
Pearlstein
were salespeople for G. Martin Frank, Ltd. ("GMF”), a fraudulently conceived business entity that sold worthless pen distributorships.
Pearlstein,
. Brothers’ testimony (albeit impeached to some effect on cross-examination) that she told Dobson about the fraudulent nature of the SAA scheme provided evidence from which the jury could have found that Dobson knew of, and nonetheless continued to participate in, the overall fraudulent scheme. There is also evidence to show that Dobson engaged in her own dishonesty simply for the purpose of increasing her sales. Under the District Court's instructions, the jury could have erroneously viewed Dobson’s individual malfeasance to be sufficient to support the 18 U.S.C. § 1341 charges levied in the Indictment.
. Moreover, subsequent to
Pearlstein
we have made other more explicit references to the culpable participation requirement. For instance, in
Genty v. Resolution Trust Corp.,
. This case, therefore, is unlike our recent decision in
Rosa
where we determined that the trial court’s jury instruction, although amounting to plain error, did not have a deleterious effect upon the defendant's substantial rights.
. The United States emphasizes Brothers’ testimony that she told Dobson that SAA was a fraudulent operation. We agree that this can be viewed as evidence of Dobson’s knowledge of the overall fraudulent nature of the scheme. On the other hand, there is evidence of Dobson’s own fraudulent sales practices. The jury instruction permitted the jury to convict based on a finding of Dobson's isolated misstаtements alone. The fact that defense counsel was able lo impeach Brothers serves to heighten the possibility that the jury disbelieved her testimony and convicted on an impermissible basis.
. Indeed, the Supreme Court has noted that even " ‘innocent’ mailings — ones that contain no false information — may supply the mailing element.”
Schmuck v. United States,
489 U.S.
*242
705, 715,
. Due to this outcome, we need not address Dobson's arguments with regard to sentencing. Of course, if Dobson is convicted again on remand, the District Court will apply the Sentencing Guidelines and Sentencing Reform Act of 1984 as interpreted in and modified by
Booker. See generally United States v. Ordaz,
