The Radia tapes controversy relates to the telephonic conversations between Nira Radia, an influence peddler and an acquaintance of the (then) Indian telecom minister A. Raja, and with senior journalists, politicians, and corporate houses, taped by the Indian Income Tax Department in 2008–09. The tapes led to accusations of misconduct by many of these people. Nira Radia used to run a public relations firm named Vaishnavi Communications, whose clients include the Tata Teleservices and Mukesh Ambani’s Reliance Industries.
After getting authorisation from the Home Ministry, the Indian Income Tax department tapped Radia's phone lines for 300 days in 2008–2009 as part of their investigations into possible money laundering, restricted financial practices, and tax evasion.
In November 2010, OPEN magazine carried a story which reported transcripts of some of the telephone conversations of Nira Radia with senior journalists, politicians, and corporate houses, many of whom have denied the allegations. The Central Bureau of Investigation has announced that they have 5,851 recordings of phone conversations by Radia, some of which outline Radia's attempts to broker deals in relation to the 2G spectrum sale. The tapes appear to demonstrate how Radia attempted to use some media persons to influence the decision to appoint A. Raja as telecom minister.
In the recorded conversations between Nira Radia and prominent figures, referred to as the Radia Tapes, several prominent figures are heard in conversation with Radia:
According to the transcripts of the tapes, Radia lobbied against the reappointment of Dayanidhi Maran to the post of Union IT and Communications minister.
Dutt: 'The stalemate (between Congress and DMK) continues, ya
Radia: 'my honest advice is that you tell them (Congress) that they need to tell him (Karunanidhi) directly ..
Dutt: 'OK, let me talk to them'.
In a later conversation at 1047 IST, Barkha says that it (conveying the message to Congress) was 'not a problem' and that she would talk to Ghulam (Nabi Azad).