请翻译收货人尚未提供发票等相关单据。根据我们经验一般轻微的会贬值约10左右中度贬值20-30严重的贬值约50。

The consignee has not provided relevant documents such as invoices. Based on our experience, minor damage usually results in a depreciation of about 10%, moderate damage results in a depreciation of 20%-30%, and severe damage results in a depreciation of about 50%.