After the cancellation of foreign exchange verification documents, there is no need to write them off. According to Linlin's survey. Com, according to the Detailed Rules for the Implementation of the Guidelines on Foreign Exchange Management of Goods Trade, an enterprise shall, within 30 days from the actual date of the import and export of goods or the receipt and payment of foreign exchange, submit the expected date of receipt and payment of foreign exchange or the import and export date and other corresponding information to the local foreign exchange bureau through the monitoring system: 130 days or more (excluding) prepaid payment and prepaid payment; Delayed collection and payment for more than 290 days (excluding); Import trade financing such as forward letter of credit (including extension) and overseas payment for more than 390 days (excluding).