Exclusive: Venezuela tightens oil prepayment rules
Venezuela's state oil firm PDVSA is toughening terms for buyers after a month-long halt to most exports of crude and fuel, demanding prepayment ahead of loadings in either cash, goods or services, company documents showed.
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### Instruction: Exclusive: Venezuela tightens oil prepayment rules

### Response: Venezuela's state oil firm PDVSA is toughening terms for buyers after a month-long halt to most exports of crude and fuel, demanding prepayment ahead of loadings in either cash, goods or services, company documents showed.