New Delhi (Agencies): Germany and Switzerland have ensured full support to India in detecting black money stashed in their countries, but have insisted that their secrecy clause, barring Indian government from making the names public, be strictly followed.

Germany, which last year provided the names of some Indians having secret accounts in Liechtenstein's LGT Bank, will share more names if it comes across any, said a German government official.

"Relevant data are always passed as so-called spontaneous information from the (German) Federal Bureau of Taxes to the tax authorities of affected countries," a spokesperson for Germany's Finance Ministry stated.

The official added that such information can't be made public and should only be used by the capable authorities.

A top Swiss government official also asserted that the information to be shared by Swiss authorities with India, once the revised tax deal between two countries comes into force, can't be made public and should be "treated as secret."

The Indian government is under intense pressure from Opposition and courts to take action against those who have amassed illicit wealth in foreign countries that have strict secrecy rules.

India is putting in place important treaties with both Switzerland and Liechtenstein, a European nation, to get access to details about Indians having illicit wealth in bank accounts there.

However, names of certain entities having accounts in LGT Bank of Liechtenstein were given to India last year by Germany. These names were part of about 1,400 stolen bank account details that were purchased by Germany, which later shared the related information with India.

The German official informed these details were shared with India "free of charge", on reciprocal basis.

India has submitted to the Supreme Court the names it got from Germany, but has refused to make them public, in view of secrecy clause in its treaties with foreign countries.

However, some names appeared in the media, claiming them to be part of the list obtained from Germany.

Reacting to these reports, Finance Minister Pranab Mukherjee on Saturday in Kolkata said that the names could not be made public, but notices have been served to 17 entities in this case and prosecution has begun.