NEW DELHI: The renewed vigour to unearth suspected blackmoney of Indians in Swiss bank accounts after a recent meeting of top officials on both sides is expected to initiate final prosecution in one of the most prominent tax crime cases related to Pune-based stud farm-owner Hasan Ali Khan .

Sources privy to the development said Indian authorities will soon communicate with Switzerland seeking a 'final data' of sorts about the purported bank accounts and transactions of Khan and his associates in the banking channels of that country which investigating agencies claimed to have unearthed earlier.

They said some financial documents linking Khan to a global arms dealer will be sent for “validation” to Swiss authorities as the transaction channels reportedly pertain to using the bank routes of the Alpine nation.

“Some information relating to a bank transfer of USD 800 million in accounts and its routing to various other accounts are pending for some years now. The biggest help of the Swiss authorities is required in getting to the bottom of this particular instance,” they said.

“The agencies, post the recent successful meeting the two sides, are very hopeful to take the case forward which has been stuck for want of crucial information for the last two-three years,” they said.

Sources said the Special Investigation Team (SIT) on blackmoney is also keen to initiate legal action and achieve finality in this case as Khan's alleged tax evasion probe is the only one issue mentioned by name in the Terms of Reference or working directives of this high-powered panel.

“The SIT has issued directions to the I-T department and Enforcement Directorate to get in touch with Swiss authorities for information in this specific case so that penal proceedings can begun in quick time. The money laundering case against Khan is pending trial in a Mumbai court since 2011,” they said.

The SIT, they said, has already decided to put on fast track the alleged tax evasion and laundering of funds case against the 60-year-old businessman.

