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# How to not oversell products?

(CS Amazon Sync)

Typical case; you are a merchant, you are selling products with a limited inventory, selling also on multiple channels such as your own shop, Amazon, other marketplaces.

To prevent overselling products you should set up an inventory rule

In the App > Rules > Inventory tab, you can configure a stock breakup, for instance;

![](https://storage.crisp.chat/users/helpdesk/website/3fa8ee645cd13200/image_n23can.png)

This rule will decrease your inventory by 5 units when the feeds will be sent to Amazon.