[2][3][4] During his career, Nanda consistently faced allegations of being one of India's most powerful arms dealers and in 2021, he was convicted by a special court for charges related to defence deals and bribery.

[17] Nanda has since the 1980s repeatedly faced allegations of being one of the three largest arms dealers in India and he was convicted by a special court in 2021 in connection with defence deals and bribery.

[5][19] According to journalist Sandeep Unnithan in 2008, his company, the Crown Corporation was "associated with major defence deals concluded with the Soviet Union and later Russia...The booming arms trade of the ’80s and ’90s gave the Nandas all the trappings of plutocracy: a sprawling mansion on Grosvenor Square in London’s exclusive Mayfair district, a mansion on Prithviraj Road in the heart of Lutyens' Delhi and Bentleys and BMWs in the garage.

"[1] In 2006, alleged arms dealer Abhishek Verma claimed that he was being framed for the Scorpene deal scam by former Deputy Prime Minister of India L.K.

[1][12] It was alleged in Operation West End, that Nanda paid a bribe to Samata Party President Jaya Jaitley.

[23] In the First Information Report filed on 9 October 2005, the CBI mentioned large payments from the firm MTU Aero Engines, a supplier to IAI, into the bank accounts of Dynatron Services, a company managed by Suresh Nanda and his family members during the relevant period.

[6] The CBI also produced as evidence, 32 incriminating conversations between Nanda and others, which included a prosecution witnesses that was related to discussions about a land deal in Goa.

However, the Supreme Court allowed Sanjeev Nanda to be released on account of his time served, required him to do two years of community service and pay a fine of 50 lakh rupees.