Former tennis champion Boris Becker has told the BBC he has a genuine diplomatic passport issued by the Central African Republic (CAR), despite CAR officials saying it is fake.
Lawyers for Mr Becker say he is immune from bankruptcy proceedings in London because he holds diplomatic status.
But the CAR's foreign minister says the passport is fake and he has asked the justice minister to investigate.
Mr Becker said he was happy to go to the CAR to end the "misunderstanding".
"I don't know what is internally happening within the politics [of CAR] but I have received the passport from the ambassador," he told the BBC's Andrew Marr Show.
"I have spoken to the president on many occasions. I believe the documents they have given me must be right."
Mr Becker was declared bankrupt in 2017 over money owed to private bank Arbuthnot Latham and is now being pursued for "further assets".
Lawyers for the 50-year-old three-time Wimbledon champion say he was appointed a sport and culture attache to the EU by the CAR in April.
In that month he tweeted a picture of himself shaking hands with CAR President Faustin-Archange Touadera in Brussels.
In a statement issued on Friday by his lawyers, Mr Becker said the furore was a "storm in a teacup".
"Someone seems to have got their wires crossed in the Central African Republic, but my appointment was entirely official and above board, and was made by the president. Everyone's seen the photos published when my appointment was announced. This fuss about documents is pretty irrelevant."