Now he is being extradited to Massachusetts.
"There are much bigger concerns about being extradited to the United States".
Tappin, 65, of Orpington, Kent, is on bail after being extradited to the US in February.
The constitutions and laws of some countries prohibit their nationals from being extradited to other countries.
"I don't have too many fears about being extradited to Sweden," he said Thursday.
He has been living under asylum there for more than a year to avoid being extradited to Sweden, where he is wanted for questioning on sexual assault accusations.
But Mr. Assange, and those around him, are convinced that, link or no, he is at risk of being extradited to the United States.
He was arrested there in 1997 on charges of passport violations and jailed for three years before being extradited to Japan, where he was detained for 18 months.
(Mr Borodin was briefly detained in New York in 2001 on money laundering charges, before being extradited to Switzerland and released).
He is waiting to hear the outcome of his appeal to the Supreme Court, the highest court in the land, against being extradited to Sweden.
He doesn't last long in New York before he is busted, and spends several years in prison there before being extradited to the UK.
