Long-term supplier's declaration 是指长期供应商声明。这份文件主要用于证明您供应的产品符合欧盟相关规定的原产地要求，以便在出口到欧盟时可以获得优惠关税待遇。

以下是一份样例供参考：

Long-term declaration for products hing preferential origin status

The undersigned [公司名称] (hereinafter referred to as “Supplier”) declare that the goods described below:

(Product name and description):

………………………………………………….

………………………………………………….

………………………………………………….

………………………………………………….

are regularly supplied to [客户公司名称] (hereinafter referred to as “Customer”) and originate in [国家名称], and satisfy the rules of origin governing trade with the European Union.

This declaration is valid for all further shipments of these products dispatched from [开始日期] to [结束日期]. I undertake to inform the Customer immediately if this declaration is no longer valid. I undertake to make available to the customs authorities any further supporting documents they require.

Place: [签署地点]

Date: [签署日期]

Name and position: [签署人姓名和职务]

Name and address of company: [公司名称和地址]

Signature, stamp: [签名和公司印章]

请根据您的具体情况填写相关信息，并在公司的抬头纸上签署。如有需要，您也可以请当地政府相关部门进行核实并签发文件。

挺复杂的帮你顶下，希望专业人士帮

挺复杂的帮你顶下，希望专业人士帮

亲 我也遇到了同样的问题你知道要怎么解决了吗？

这么简单，不就是盖个章的事吗。只要符合，就没问题。