A whistleblower is alleging that the FBI and the Justice Department are in possession of a document that describes a criminal scheme involving then-Vice President Joe Biden and a foreign national relating to the exchange of money for policy decisions, House Oversight Committee Chairman James Comer and Sen. Chuck Grassley said Wednesday.

Comer, R-Ky., and Grassley, R-Iowa, said the whistleblower claims the document "includes a precise description of how the alleged criminal scheme was employed as well as its purpose."

Joe Biden leaves church washington d.c.

President Biden is seen in Washington, D.C., on Oct. 1, 2022. (Samuel Corum/Bloomberg via Getty Images)

The document, an FBI-generated FD-1023 form, allegedly details an arrangement involving an exchange of money for policy decisions. 

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Comer issued a subpoena Wednesday following legally protected disclosures to Grassley’s office.

"We believe the FBI possesses an unclassified internal document that includes very serious and detailed allegations implicating the current President of the United States," Grassley said. "What we don’t know is what, if anything, the FBI has done to verify these claims or investigate further. The FBI’s recent history of botching politically charged investigations demands close congressional oversight." 

James Comer

House Oversight and Accountability Committee Chairman James Comer, R-Ky. (AP Photo/J. Scott Applewhite)

Comer added that the information "raises concerns that then-Vice President Biden allegedly engaged in a bribery scheme with a foreign national."

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"The American people need to know if President Biden sold out the United States of America to make money for himself," Comer said. "Senator Grassley and I will seek the truth to ensure accountability for the American people."

Comer and Grassley notified FBI Director Christopher Wray and Attorney General Merrick Garland on Wednesday of the "legally protected and highly credible unclassified whistleblower disclosures."  

Sen. Chuck Grassley speaks into mircrophone during hearing

Sen. Chuck Grassley, R-Iowa.  (Al Drago/Bloomberg via Getty Images)

"Based on those disclosures, it has come to our attention that the Department of Justice (DOJ) and the Federal Bureau of Investigation (FBI) possess an unclassified FD-1023 form that describes an alleged criminal scheme involving then-Vice President Biden and a foreign national relating to the exchange of money for policy decisions," they wrote, adding that the whistleblower alleged that the document "includes a precise description of how the alleged criminal scheme was employed as well as its purpose." 

Comer and Grassley said that based on "the alleged specificity within the document, it would appear that the DOJ and the FBI have enough information to determine the truth and accuracy of the information contained within it." 

Chris Wray testifies before House intel

FBI Director Christopher Wray. (AP Photo/Carolyn Kaster)

"However, it remains unclear what steps, if any, were taken to investigate the matter," they wrote, adding that the "significant public interest in assessing the FBI’s response to this information, as well as growing concern about the DOJ and the FBI’s track record of allowing political bias to infect their decision-making process, necessitate exacting congressional oversight." 

"The DOJ and the FBI appear to have valuable, verifiable information that you have failed to disclose to the American people," they added, notifying them that Congress "will proceed to conduct an independent and objective review of this matter, free from those agencies’ influence." 

Merrick Garland news conference

U.S. Attorney General Merrick Garland delivers remarks at the U.S. Justice Department.  (Anna Moneymaker/Getty Images)

"Transparency brings accountability," they wrote. 

Comer's committee has been investigating Hunter Biden's foreign business dealings, how the Biden family has been involved, and whether President Biden has been involved in those foreign business dealings. Comer has warned the business ventures with individuals in China, Ukraine and more pose a national security risk. 

In the Senate, since 2019, Grassley has been investigating Hunter Biden's business dealings and any alleged involvement by the elder Biden. 

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The White House has maintained that the president never spoke to his son about his business dealings, and has continued to say that the president was never involved in them. Officials also say the president has never discussed investigations into members of his family with the Justice Department.

White House spokesperson for oversight and investigations, Ian Sams, told Fox News Digital on Wednesday that for "going on five years now, Republicans in Congress have been lobbing unfounded, unproven, politically-motivated attacks against the President and his family without offering evidence for their claims or evidence of decisions influenced by anything other than U.S. interests."

"That’s because they prefer floating anonymous innuendo, amplified by the megaphone of their allies in rightwing media, to get attention and try to distract and deflect from their own unpopular ideas and lack of solutions to the issues the American people actually care about," Sams said. "When it comes to President Biden’s personal finances, anybody can take a look: he has offered an unprecedented level of transparency, releasing a total of 25 years of tax returns to the American public."

Hunter Biden gets off plane with president

President Biden and his son, Hunter Biden, step off Air Force One at Hancock Field Air National Guard Base in Syracuse, N.Y., on Feb. 4, 2023. (AP Photo/Patrick Semansky)

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Hunter Biden has been under federal investigation since 2018. The federal investigation into his "tax affairs" began amid the discovery of suspicious activity reports (SARs) regarding funds from "China and other foreign nations."

The FBI confirmed it had received the letter, adding, "We don’t have any additional comment."

Fox News' Kelly Phares and Jake Gibson contributed to this report.