A fixed asset (vehicle, machine, equipment) is not goods and cannot be sold as an item of type Goods: such an item has no stock, the invoice line is shown in purple and the invoice cannot be approved. Companies with the Fixed Assets module sell a fixed asset with the [ FA Invoices ] form, which calculates depreciation up to the day of sale and posts the derecognition of the asset itself. A company without that module records the sale with a service, following the procedure below.