The government has already taken the "extraordinary step" of invoking Section 7 of the RBI Act (that empowers the government to issue directions to the RBI), he said.
He alleged that the "immediate goal of the government is to lay its hands on the reserves of the RBI and appropriate a sum of at least Rs 1 trillion to meet its fiscal deficit target and to increase spending in an election year".
He also said that "According to reports the BJP government is planning to override the RBI governor through the board of directors in which it has planted its hand-picked nominees".
Taking to Twitter, he said the RBI Board had met on November 8, 2016, and "disagreed" with the key reasons given by the government, but "obediently endorsed demonetisation" and that was a "black day" in the central bank's history.
Chidambaram also hit out at the government over its claim to "fix appropriate economic capital framework of RBI" after it rejected as speculation reports that it was seeking the reserve bank's approval for release of Rs 3.6 trillion.
"RBI minutes of 7-11-2016 is a comprehensive repudiation of the government's "justification" for demonetisation.
"RBI Board, with many members absent, met at 5.30 pm on 8-11-2016 and disagreed with the key reasons given by the government, yet obediently endorsed demonetisation. That was a black day in RBI's history," he tweeted.
He said that "shockingly, government's paper calculated GDP growth in real terms and growth in money circulation in nominal terms, yet compared the two and reached absurd conclusions. So much for the competence of the government."
On Modi government's clarification that it is not seeking transfer of Rs 3.6 trillion reserves from the RBI and the only proposal under discussion is to fix appropriate economic capital framework of the central bank, the former finance minister questioned the claim as a "jargon".
"What is this jargon put out by the government about "fix the economic capital framework of the RBI"?
"You fix what is broke. Which part of RBI has broken that the government is anxious to fix," he asked.
Economic Affairs Secretary Subhash Chandra Garg earlier tweeted, "Lot of misinformed speculation is going around in media. Government's fiscal math is completely on track. There is no proposal to ask RBI to transfer Rs 3.6 or 1 trillion, as speculated."
On the fiscal roadmap, he said, the government will stick to the fiscal deficit target of 3.3 per cent for the current financial year.
Garg further said the only proposal "under discussion is to fix appropriate economic capital framework of RBI".
The clarification came amid reports that the government is seeking transfer of at least a third of Reserve Bank's Rs 9.6 trillion reserves.
In Guwahati, Chidambaram said he fears the worst at the next meeting of the RBI board on November 19.
"I consider it my duty to warn the people of the country of the catastrophic consequences of the BJP government's ill-conceived actions."
He said, "Our (Congress) immediate concern is the BJP government's determined efforts to wreck or capture crucial institutions of the country. The latest victim is the Reserve Bank of India."
Asked if the RBI governor would resign over the standoff with the Centre if the central bank fund is transferred to the government through the resolution, Chidambaram said: "Either way - whether the governor resigns or the money is transferred - it will be disastrous".
He said if RBI is directed by the government to transfer money from its reserve it will be "way more dangerous than the note ban. No government has till now made such a proposal to the RBI".
To a question whether there was legal recourse available to halt the government's alleged move, Chidambaram, also a legal luminary, said, "I don't know. I will have to see."
Asked to comment on his tweet that the results of the midterm elections in the US is a lesson for India, he said, "America is becoming one person, one man government. Institutions are being humiliated. The results were a mandate of the people for checks and balances".
Referring to India, he said, "In India too it is the same. Cabinet, ministers have no power. Institutions are humiliated. So people of India should vote for checks and balances.
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