He reported himself to a prison in Atlanta and was later released on a bail of 150,000 dollars, just over 1.6 million Swedish kronor.
Giuliani was indicted last week along with Trump and 17 other people suspected of trying to influence the results of the 2020 Georgia election.
Trump himself has written on his media platform Truth Social that he will go to Atlanta on Thursday. Trump’s bail has been set at $200,000.