Account Invoice Payment Block

This module adds a simple switch on invoices and other accounting documents to stop them from being paid.

On the invoice form, a new "payment blocked" checkbox appears next to the payment reference. It is only shown for posted documents that are not yet fully paid (payment state "not paid" or "partially paid") and that are customer invoices, customer credit notes, vendor bills, vendor credit notes, customer receipts or vendor receipts.

When someone tries to register a payment on one or more blocked documents, Odoo stops the action and shows an error listing each blocked invoice by name, so the user immediately knows which document caused the problem. If none of the selected documents is blocked, the normal payment registration continues as usual.

The module only touches the accounting documents model account.move and its form view; it does not add menus, reports or scheduled actions.