> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://bes.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why do "Unknown" suppliers appear in the "Supplier Analysis" report?

The reasons for the appearance of Unknown suppliers in the report are:

* the customer has some products not tied to specific suppliers;
* products received from these suppliers are sold out. In this case, the FIFO algorithm binds the stocks of such products to an Unknown supplier.


![](https://storage.crisp.chat/users/helpdesk/website/8758e5f16dbc1000/image_w9p5gr.png)