Gandhi had declared himself a British citizen in the registration papers of
"I have traced Backops as a shell firm to companies receiving kickbacks in Indian defence deals' illegal commission," Swamy tweeted, adding that he will soon hold a press conference to show papers that support his charge.
Swamy said he will ask the Enforcement Directorate to file a case against the Congress vice president for forex violation under FCRA, PMLA and FEMA.
"Basic question is why an MP and a party VP needs to open a company in Britain and all in secret?," he asked.
Companies House, a UK government department, had last week confirmed that the 2005 and 2006 returns of Backops, a private firm set up in the UK by Rahul Gandhi in 2003, showed his nationality as British but said it "could very well be an error made by whoever submitted the information".
The Congress denied the allegation about Gandhi's nationality saying that from the day he was born, he had never held citizenship of any country other than India, "nor has he represented as such".
AICC spokesman Abhishek Singhvi said, "You have the government, you have the entire machinery and you should be able to put a single proof and not these straws in the winds by a person like Swamy. If you are the government, you should have produced some material rather than relying on Swamy's allegations which are false."
Swamy has written to Lok Sabha Speaker
He has demanded that Gandhi be stripped of Indian citizenship and Lok Sabha membership.