Make sure that if you have any such accounts, you properly report them. This means electronically filing FinCEN Form 114 by June 30 (April 15 for filings beginning in 2017) to report foreign accounts that total more than $10,000 at any time during the previous year. And those with a lot more financial assets abroad may also have to attach IRS Form 8938 to their timely filed tax returns.
The IRS is intensely interested in people with money stashed outside the U.S., especially in countries with the reputation of being tax havens, and U.S. authorities have had lots of success getting foreign banks to disclose account information. The IRS also uses voluntary compliance programs to encourage folks with undisclosed foreign accounts to come clean — in exchange for reduced penalties. The IRS has learned a lot from these amnesty programs and has been collecting a boatload of money (we’re talking billions of dollars). It’s scrutinizing information from amnesty seekers and is targeting the banks that they used to get names of even more U.S. owners of foreign accounts.