名词
中文翻译：取消信函
同义词：
['cancellation letter', 'cancellation receipt', 'cancellation certificate']
例句：
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1. Thecompany issued a letter of cancellation to thecustomer for non-payment.
公司向客户发出了一封取消信，因为未付款。
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2.The bank required the signature on the letterof cancellation before processing the transaction.
银行要求在处理交易前在注销证明上签字。
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3. The cancellation process was completed successfully afterthe necessary documentation was submitted.
提交了必要的文件后，注销过程顺利完成。