请把你的销售凭证放于安全的地方。
法律的原则是，重要信息的披露，如风险与费用、销售凭证等，要充足，能够保护公众利益。
The legal principle is that disclosure of important information, such as risks and fees, in sales documents, is enough to protect the public.
例如，网上购物的应用程序可能允许用户使用他们的Facebook凭证进行登录，并允许他们向Facebook发布销售信息。
For example, an on-line shopping application might allow a user to sign in with their Facebook credentials and provide a means to post offers to that site.
卖方必须提供符合销售合同规定的货物和合同可能要求的、证明货物符合合同规定的其他任何凭证。
The seller must provide the goods and the commercial invoice in conformity with the contract of sale and any other evidence of conformity that may be required by the contract.
由于没有合法清关凭证，中国纺织品只能在市场上销售，不能进入专卖店或正规商场。
Because no legitimate clearance certificates, the only Chinese textile products on the market, can not enter the store or conventional malls.
由于没有合法清关凭证，中国纺织品只能在市场上销售，不能进入专卖店或正规商场。
Because no legitimate clearance certificates, the only Chinese textile products on the market, can not enter the store or conventional malls.
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