www.findknowdo.com/news/05/01/2019/doj-and-irs-seek-information-finnish-individuals-using-us-payment-cards?utm_campaign=Cabinet%20Newsletter&utm
www.duanemorris.com/alerts/us_assists_finland_investigation_payment_cardholders_unreported_income_john_doe_summons_0519.html
www.justice.gov/opa/pr/court-authorizes-service-john-doe-summonses-seeking-information-about-finnish-residents-using
www.bakermckenzie.com/en/insight/publications/2019/05/irs-to-obtain-us-bank-information
See also:
thetaxtimes.blogspot.com/2018/03/district-court-upholds-another-irs.html