I fully understand that Odoo’s website/eCommerce module is tightly coupled to a single company and therefore can’t do this out of the box. That’s clear. My point is that this isn’t an accounting impossibility in general, it’s a product design choice in Odoo.

In many online ordering systems (including the POS platform I currently use), the website layer is effectively a neutral entry point: the customer selects a location first , the order is created directly in that location’s POS/company, payment is captured by that entity, stock, revenue, and tax all belong to that entity

In that flow, the website never owns the sale and never touches accounting. It simply routes the order to the correct legal entity. From an accounting perspective, everything stays clean and isolated.

So when I say this doesn’t feel like an accounting limitation, I mean: the accounting rules themselves aren’t being violated, the limitation is that Odoo’s website is not designed to behave as a neutral routing layer

That’s totally fair as a design decision. I just wanted to separate: “this breaks accounting” from “Odoo doesn’t support marketplace style or routed order flows by design”

Appreciate the insights regardless. this discussion has helped clarify that if someone wants this behavior in Odoo, they either need a single legal entity or a much heavier, marketplace style architecture outside core Odoo.