MUST NEED POA(POWER OF ATTORNEY) FROM CNEE FOR DDP

MUST NEED POA(POWER OF ATTORNEY) FROM CNEE FOR DDP
和海外代理的邮件联系中有这么一句话 MUST NEED POA(POWER OF ATTORNEY) FROM CNEE FOR DDP.想请教英语好后者货代行业的前辈是什么意思.POA到底是个什么文件还是授权?需要怎么样出具.