Sale Cancel Restrict

This module gives you a safety switch for cancelling sales orders. Once the option is turned on, Odoo will refuse to cancel a sales order in two situations: when at least one of its deliveries is already marked as done, or when it still has invoices that are not cancelled (draft or posted).

Where to find it: - Go to the Sales settings screen; a new checkbox appears in the sales management section, with a help text explaining the rule. - The setting is stored per company, so each company can decide independently whether the restriction applies.

What changes for users: - Trying to cancel a blocked sales order shows a clear error message naming the order, telling you it has completed transfers or that you must cancel the invoices first. - The check runs automatically every time a cancellation is attempted on a sales order. - The restriction only applies when the company option is enabled; if it is off, cancellation behaves as usual.

The module extends the sales order, company and settings models, and depends on sale_stock so it can look at the deliveries linked to the order. It does not add new menus or reports; it only adds the setting and the cancellation check.