Emails released by the US Department of Justice earlier this month appear to show the former duke sharing reports of official visits to Hong Kong, Vietnam, and Singapore.
One email, dated November 2010, was forwarded by Mountbatten-Windsor just five minutes after being sent by his then-special advisor, Amir Patel.
The former duke made the visits in his capacity as trade envoy in late 2010, conducting meetings and trade talks.
Additionally, on Christmas Eve 2010, Mountbatten-Windsor looped Epstein in on a confidential brief on investment opportunities in the reconstruction of Helmand Province, Afghanistan.
Mountbatten-Windsor has vehemently denied any wrongdoing.
The messages came after Epstein's 2008 conviction for soliciting a minor for prostitution.
Mountbatten-Windsor previously told BBC's Newsnight in 2019 he had cut off contact with the convicted paedophile in December 2010 during a visit to New York.
On February 9, 2011, Mountbatten-Windsor told Epstein he had visited a private equity firm the week before and "thought of you" as the financier, who was reportedly "looking for somewhere for money to go".
Official government guidance underscores that the role of a trade envoy carries a duty of confidentiality regarding sensitive information.
"This may include sensitive, commercial, or political information shared about relevant markets/visits," the guidance read.
"This duty of confidentiality will continue to apply after the expiry of their term of office. In addition, the Official Secrets Acts 1911 and 1989 will apply."
The former duke served as the UK's special representative for trade and investment between 2001 and 2011.
Vince Cable, business secretary at the time, told the BBC of the emails: "I was unaware of Andrew ... sharing information about investment opportunities [in Afghanistan] before, this is the first I've heard of it."
The former duke features a number of times in the latest release of documents, including images apparently showing him crouching over an unidentified woman in what appears to be Epstein's New York mansion.
In 2022, the former duke paid millions of pounds to Virginia Giuffre, his main accuser, despite claiming never to have met her.
The King later stripped him of his titles following the posthumous release of a book by Giuffre, who alleges she was trafficked by Epstein and his former girlfriend, Ghislaine Maxwell, at the age of 17.
The Press Association understands that Andrew moved out of Royal Lodge and relocated to Norfolk to a property on the King's Sandringham estate earlier this month, reported by the Sun to be Wood Farm Cottage, where he will stay temporarily.
It is understood the former duke's new home of Marsh Farm is not yet fully ready, but he is expected to move in by the start of April.