Hi,

On Odoo Online (SaaS, Odoo 19), the standard POS settings allow you to show available stock in the POS and give a warning when stock is insufficient. However, there is no built-in option to completely block the sale of products when stock reaches zero. The “Inventory Availability” feature is informational and cannot enforce a hard stop in the POS.

Recommended approaches without custom code (Odoo Online):

    Use stock warnings in combination with training: POS users are shown the quantity and warned if stock is zero, and staff are instructed not to sell such products.

    Use “Available Quantity” filters: You can filter the POS product list to show only products with stock, but this does not prevent adding products to the order if done manually.

If a hard restriction is required:

    You would need customization in POS, which is only possible on Odoo.sh or Odoo On-Premise. On those platforms, a developer can extend the POS model to prevent adding products with zero or negative stock.

Related module:-

* https://apps.odoo.com/apps/modules/18.0/pos_zero_quantity_restrict

* https://odoo-community.org/shop/stock-disallow-negative-2467#attr=941918

* https://apps.odoo.com/apps/modules/18.0/stock_no_negative

*  https://apps.odoo.com/apps/modules/18.0/sale_stock_restrict

Hope it helps

Hello Sai Praveen,
Odoo 19 does not have a default feature like this. You need to customize it.