要将LOA授权委托书经过印尼驻华使馆认证，您需要按照以下步骤来办理：
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在撰写LOA授权委托书时，需要确保内容准确无误，包括被授权方姓名、公司名称、产品信息等。同时，还需要注明委托书人姓名、公司名称、联系方式等相关信息。
将撰写好的LOA授权委托书打印出来，并加盖公司印章，然后提交至贸促会进行认证。
在贸促会完成认证后将资料提交至外交部和印尼驻华使馆进行认证。
在认证时，需要提供相关材料，包括授权委托书、营业执照复印件等。
LOA to accredit a power of attorney after the Indonesian embassy certification, you need to be dealt with in accordance with the following steps to:
Writing in a LOA accredit a power of attorney, the need to ensure that content are accurate, including authorized party name, company name, product information, etc.At the same time, also need to indicate the power of attorney person name, company name, contact information, etc.
Will write good LOA accredit a power of attorney to print out and stamp company chop, and then submit to ccpit for certification.
After ccpit complete authentication data submitted to the Ministry of Foreign Affairs and the Indonesian embassy in China authentication.