Block or warn when cashiers add products beyond stock at the Point of Sale. Stock is checked against the POS shop source location using on-hand or available quantity. Choose strict blocking or a warning with Order Anyway, and exempt individual products when negative sales are allowed.

Out-of-Stock Restriction

Prevent adding products when stock at the POS warehouse location is zero or insufficient. Applies when tapping a product or increasing quantity on an order line.

Strict or Warning Mode

Fully Restrict blocks the line completely. Warning Only shows a popup with Order Anyway so a supervisor can override when needed.

Per-Product Override

Enable Allow Negative Sales on specific products to bypass the global restriction for items that may sell below zero.

Stock settings on the POS

Open Point of Sale → Configuration → Settings, select your shop, and use the Stock Configuration section. Enable restriction, choose On Hand or Available quantity, and pick Fully Restrict or Warning Only mode.

Blocked when fully restricted

In Fully Restrict mode, adding a product beyond stock opens a Product Stock Issue dialog showing on-hand, available, customer requested quantity, and extra requested units. The cashier can only Cancel — the line is not added until stock allows it.

Override in warning mode

In Warning Only mode, the same popup appears but includes Order Anyway. The cashier can proceed when a manager-approved exception is needed, or dismiss with Cancel.

Product-level exception

On the product form, enable Allow Negative Sales for items that should always be sellable at the register regardless of the global restriction. Those products add to the order without triggering the stock popup.

1. Install the module (requires point_of_sale and stock).
2. Confirm your POS has an inventory operation type with a source location (the warehouse stock the register draws from).
3. Go to Point of Sale → Configuration → Settings and select your shop.
4. Under Stock Configuration, enable Restrict Product Out of Stock in POS.
5. Set Stock Type (on-hand vs available) and Restriction Mode (strict vs warning).
6. On products that may sell below zero, enable Allow Negative Sales on the product form.
7. Close and open a new POS session after changing settings.

At the register

Stock check when adding a product to the order.

Stock check when increasing quantity on an order line.

Product Stock Issue popup with on-hand, available, customer requested, and extra requested quantities.

Order Anyway in warning mode; line blocked in strict mode.

Behind the scenes

pos.config fields: is_restrict_product, stock_type, stock_restriction_mode.

Stock read from stock.quant at the POS source location via get_product_stock_for_pos.

product.template.allow_negative_sales bypasses restriction per product.

OWL popup and PosStore / PosOrderline patches for add-line and qty-change flows.

Version

Built for Odoo 19.0, compatible with Community and Enterprise.

Dependencies

Requires point_of_sale and stock. Kit product checks use mrp when installed.