The private bank's compliance comes under renewed scrutiny in a U.S. tax evasion dispute. 

Geneva-based Mirabaud & Cie. has been questioned by a U.S. senator whether it disclosed information to the Internal revenue Service (IRS) about Brockman’s accounts, «Bloomberg» reported.

The Swiss private bank is linked to the biggest suspected tax fraud in U.S. history, revolving around Robert Brockman. U.S. prosecutors accuse the Texas-based software billionaire of hiding as much as $2 billion from the IRS thanks to a complicated tangle of offshore entities some tied to Switzerland

Hidden Accounts

According to a letter reportedly seen by Bloomberg, Senator Ron Wyden, chairman of the Senate Finance Committee wrote the private bank: «I am deeply concerned by the duration and scale of this alleged tax evasion scheme, particularly the ability to hide billions of dollars offshore from the IRS for such an extended period of time,» including in accounts at the bank.

Mirabaud replied in an emailed statement  that it had «cooperated fully with all requests for information made by the U.S. authorities» and has «fully implemented procedures» to comply with requirements on reporting about U.S. account holders. 

Royal Problem

It also said that was unaware of Brockman’s real involvement in the accounts held with the bank, as none of these were in his name.  Following Robert Brockman’s indictment last October, a Geneva prosecutor ordered his accounts at both Mirabaud and Syz to be frozen.

The U.S. issue adds to a «king-sized» headache in Geneva for Mirabaud and in particular senior partner Yves Mirabaud.