求助，货快到港了，客人要求出质量保证书有质量问题要赔偿，可以接受吗？
西班牙客人货快到港了，本来说余款1万美金要我先电放等收到货后10天内付款，我没同意，后来又发邮件说要出一份质量保证书才付款,其实是担心质量,下面是保证书内容
The company XXXXX BAGS LIMITED(我们工厂) declares that the 40.250 drawstring bags Peppa Pig , made in poliéster 210 D, produced for XXXXXXX, are manufactured at the same level of quality of similar productions made before for XXXX（之前做过一次这个客户).
If there are more than a 2% units with lower level quality , XXXXXX BAGS LIMITED(我们工厂) accept the compromise to :
1 - replace the lower quality units urgently in CIF conditions,
2 - or refund the purchase cost , at 0,37 US $ + 0,04 US$ (transport and custom costs) , per unit.
客人 有权选择 option 1 or 2
该不该接收保证书盖章呢？
The company XXXXX BAGS LIMITED(我们工厂) declares that the 40.250 drawstring bags Peppa Pig , made in poliéster 210 D, produced for XXXXXXX, are manufactured at the same level of quality of similar productions made before for XXXX（之前做过一次这个客户).
If there are more than a 2% units with lower level quality , XXXXXX BAGS LIMITED(我们工厂) accept the compromise to :
1 - replace the lower quality units urgently in CIF conditions,
2 - or refund the purchase cost , at 0,37 US $ + 0,04 US$ (transport and custom costs) , per unit.
客人 有权选择 option 1 or 2
该不该接收保证书盖章呢？
货款
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按先前签订的合同履行，现在出质量保证书对您们不利。很多客户就是没有质量问题，也以质量问题为借口要求少付款，别上当
按之前的合同履行，现在尾款未付，又签这个玩意，有多半是客户起了某种心思，很有可能到时候这一万美金还不够赔偿的，到时候你还得再往里面填坑
