U.S. sanctions on Venezuela oil company CFO tangle financial deals -sources

By Alexandra Ulmer and Marianna Parraga CARACAS/HOUSTON, Aug 30 (Reuters) – U.S. sanctions on thefinance boss of Venezuela’s oil company PDVSA have led to someexports to the United States being blocked as banks andinvestment funds refuse to provide letters of credit topotential buyers, three financial sources said. U.S. businesses are barred from dealing with a sanctionedperson or company and one of the sources said the sanctions onPDVSA’s Finance Vice President Simon Zerpa wer