Public letters 15 October 2018 U.S. sanctions against Iran – Letter from Markus J. Beyrer to Andrea M. Gacki, OFAC (Office of Foreign Assets Control) of the US Department of the Treasury Documents U.S. sanctions against Iran - Letter from Markus J. Beyrer to Andrea M. Gacki, OFACAttachment - Key issues raised by European businesses for consideration by the Office of Foreign Assets Control Trade and international relationsBilateral relationsUnited StatesTrade technical issuesTrade defence instruments