The move comes after Italy refused India's request to extradite Gerosa, saying it did not have any mutual legal assistance treaty.
A Central Bureau of Investigation (CBI) source related to the development said that under the Italian law, there is provision to extradite a person wanted in any case after fulfilling certain criteria.
"Thus, the CBI has reminded Italy about its law under which Gerosa can be extradited to India," he said.
He also said that the extradition request has been sent through the diplomatic channel.
According to CBI officials, Gerosa, 70, is one of the three alleged middlemen wanted in this case and his interrogation and statement is very important for both the Enforcement Directorate (ED) and the CBI, who are probing the case.
In October last year, Italian authorities, on the basis of an Interpol notice sought by the ED in connection with its money laundering probe in the choppers deal case, had arrested Gerosa but soon released him.
The ED had last year notified an Interpol red corner notice (RCN) against Gerosa and two others -- Briton Christian Michel James and Italian Guido Haschke.
The CBI has already filed a charge sheet in this case, in which the three are co-accused.
The CBI named former Indian Air Force chief SP Tyagi, his cousin Sanjeev alias Julie, then IAF Vice Chief JS Gujral and advocate Gautam Khaitan as the four Indians in the chargesheet, which mentioned Mr Khaitan as the "brain" behind the deal.
On January 1, 2014, India scrapped the contract with Finmeccanica's British subsidiary AgustaWestland for supplying 12 AW-101 VVIP choppers to the IAF over alleged breach of contractual obligations and charges of paying kickbacks to the tune of Rs 423 crore by it for securing the deal.
The CBI, which registered an FIR in the case on March 12, 2013, has alleged that Mr Tyagi and the other accused received kickbacks from AgustaWestland to help it win the contract. The FIR mentioned charges of criminal conspiracy, cheating and the Prevention of Corruption Act.
The CBI said the company was favoured in lieu of illegal gratification accepted through different companies in the name of consultancy services.
According to the CBI, Mr Tyagi took bribes of several crores, through middlemen and a complex route of companies in several countries, from AgustaWestland to change the specifications of the contract -- reducing the operational flight ceiling from 6,000 metres, as originally proposed, to 4,500 metres and bringing down the cabin height to 1.8 metres.
The twin modifications were allegedly meant to rig the deal in favour of AgustaWestland, which eventually walked away with the order to supply 12 choppers for the Communication Squadron of the IAF for ferrying the President, the Prime Minister and other VVIPs.
The CBI probe revealed that several payments were made to the Tyagis by Haschke, Gerosa and Michel as part of the alleged bribery.
Mr Tyagi, who was IAF chief from 2004 to 2007, his cousin and Mr Khaitan were arrested in December last year by the agency in connection with the case.
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