Embassies in central London owe more than £1.5m in unpaid parking fines, including one Sudanese diplomat who owes £37,000 for 349 separate tickets.
Westminster Council has begun talks with the Foreign Office in a bid to get foreign governments to pay up.
Among the worst offenders were diplomats from Sudan, Kazakhstan, Afghanistan, Egypt and Saudi Arabia.
A spokesman for the Afghan embassy said staff and visitors had trouble trying to park outside the building.
Councillor David Chalkley said it was time for foreign dignitaries to "play fair" and obey parking laws.
He said: "All motorists who break traffic laws should be subject to the same penalties, regardless of their citizenship or job title.
"No-one likes getting a parking ticket but most motorists play fair and either pay the fine or follow the appeals process."
Lack of parking
Mr Chalkley accused diplomats of hidin
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