亚马逊帮助里有说造成unavailable balance的原因：
https://www.amazon.com/gp/help ... 18060
Common reasons for an unavailable balance are as follows:
•One or more A-to-z Guarantee claims are being processed against your account. Some claims may take up to 14 days or longer to resolve. Starting from the date a claim is filed, matching funds equal to the amount of the claim are held in your account until the claim is resolved.（账号里有AZ Guarantee claim,等claim得到解决后，亚马逊会解除这笔冻结的资金）
•One or more chargebacks have been filed by a buyer against your account, or Amazon has received chargebacks against your account within the last 30 days.（最近30天，有买家提交chargeback claim）
•Based on information available to Amazon, we reasonably conclude that your actions or performance may result in buyer disputes, chargebacks, or other claims against your sales transactions on Amazon.（根据账号表现及交易情况，亚马逊推断买家可能会投诉）
•As a security measure, we may also reserve a portion of your balance while we conduct a review of your seller account if we observe an unexpected change in your sales or account activity.（为了安全起见，亚马逊对账号进行审核，如果产品销售和账号活动有异常，亚马逊会预留一部分资金）
400-6929-020
