The former president, who was a New York real estate developer at the time, signed a copy of his book “The America We Deserve” to Giuliani, who was the Republican mayor of New York City at the time, in January 2000.
“To Rudy – the best mayor NYC has ever had! I promise I will never go against you – Donald,” the note reads.
The item sold for $54,143 Wednesday on RR Auction, an auction site specializing in historical artifacts, autographs and memorabilia, according to the site.
RR Auction said the product was certified but did not specify whether it was sold by Giuliani or by another party.
Sixteen years after the date on the memo, Trump took office in the White House, during which time Giuliani served as his personal attorney.
Giuliani is currently under federal investigation and has been named in several lawsuits related to his work in that position. $1.3 billion lawsuit He is seeking compensation from Dominion Voting Systems for lies spread by Trump and his allies about election fraud.