In case of non - delivery, return to ( the ) sender.

( 邮件用语 ) 无法投递时, 退回原处.

《现代英汉综合大词典》

In case of non - delivery, letters must be returned to the senders.

信件无法投递时, 务必退还原主.

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Please note that we need these goods rather urgently owing to non - delivery by our regular suppliers.

由于我们原来的供应商并未交货,故对此类货品,本公司需求甚急.

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The remedies under article are exclusive of any other remedy for delay in delivery or non - delivery.

5本条款项下的补偿不包括迟延交货或不交货时的其它补偿.

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