Susanne D. Rüegg Meier, who helped the taxpayers conceal assets and income in secret Swiss bank accounts, admitted that the tax loss associated with her criminal conduct was between $3.5 million and $9.5 million, the department said. She faces a statutory maximum sentence of five years in prison, a period of supervised release, restitution and monetary penalties at her scheduled sentencing on Sept. 8, it said.

It was not clear whether Rüegg Meier was in the United States.

Credit Suisse pleaded guilty in May 2014 to conspiring to aid and assist taxpayers in filing false returns and was sentenced in November 2014 to pay more than $2 billion (1.5 billion pounds) in fines and restitution, it said.

(Reporting by Eric Walsh; Editing by Sandra Maler)