It turns out that over 120 FCIB account holders stepped forward under the IRS voluntary disclosure program.

FORBES: Wells Fargo Hit With IRS Summons For Tax Haven Account Data

The IRS claims U.S. taxpayers use FCIB to keep offshore accounts undetected and skirt taxes and disclosure rules.

FORBES: Wells Fargo Hit With IRS Summons For Tax Haven Account Data

The IRS wants Wells to hand over data on U.S. taxpayers with accounts at Canadian Imperial Bank of Commerce FirstCaribbean International Bank (FCIB).

FORBES: Wells Fargo Hit With IRS Summons For Tax Haven Account Data