reserve amount may exist in your seller account for one or more of the following reasons:
You are on the Individual selling plan. The reserve reflects your orders confirmed as shipped during the 14 days immediately preceding the settlement date.
Amazon is processing one or more A-to-z Guarantee claims filed against your seller account within the past 30 days.
Amazon is processing one or more chargebacks filed against your seller account within the past 30 days.
Amazon reasonably concludes that your seller account actions or performance may result in buyer disputes, chargebacks, or other claims against your seller account.
Amazon is conducting a review of your seller account because we observed an unexpected change in your sales or account activity.