Hello, many thanks for your solution. I have paste the Python code as you proposed. 

res = (records.origin).startswith("S0")
if res:
sale_id = env['sale.order'].search([('name','=',records.origin)])
sale_id._create_invoices()

But when i save, i receive the following Validation error message : 

IndentationError : expected an indented block at line 3 sale_id = env['sale.order'].search([('name','=',records.origin)])

Also, I am not much familar with the Python code, but i see the first line startwith("SO"). Does it mean that my Sales Order have to start with SO ? Our sales order come from different source and not all Sales Order start with 'SO". For example : Imported Sales order from an US Shopify website starts with "US", EU Shopify starts with "EU", etc. 

Many thanks

Do u solve it yet?  Trying to automated invoice for Month end too. 

In Odoo, you can create an invoice automatically after a delivery transfer is done by creating a new module and overriding the _action_done method of the stock.picking model.

Here is an example of how you can create an invoice automatically after a delivery transfer is done:

Create a new module, for example stock_invoice_auto.

In the models folder of your module, create a new file called stock.py and add the following code:

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from odoo import api, fields, models

class StockPicking(models.Model):

    _inherit = 'stock.picking'

    def _action_done(self):

        res = super(StockPicking, self)._action_done()

        for picking in self:

            if picking.picking_type_id.code == 'outgoing':

                invoice_id = self.env['account.move'].create({

                    'type': 'out_invoice',

                    'partner_id': picking.partner_id.id,

                    'invoice_line_ids': [

                        (0, 0, {

                            'product_id': move.product_id.id,

                            'name': move.product_id.name,

                            'quantity': move.product_uom_qty,

                            'price_unit': move.product_id.lst_price,

                            'account_id': move.product_id.categ_id.property_account_income_categ_id.id,

                        })

                        for move in picking.move_lines

                    ],

                })

                invoice_id.post()

        return res

Add the dependencies in the manifest.py file of your module

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    'depends': ['base','sale','stock'],

Update the module list and install the stock_invoice_auto module.

Once the installation is done, you can test it by creating a delivery order, and confirm it, you should see the invoice created automatically.

Please note that the above code is an example, you might need to adapt it to your specific requirements

Hello Dan Witting,

You Can Create Draft Invoice using Automated Action.

Find Example in comment.

Steps -
1) Confirm Sale Order.
2) Validate the quantity.
3) When the state changes from Ready to Done State, then your invoice will be generated.

I hope this will help you.

Thanks & Regards,
Email: odoo@aktivsoftware.com
Skype: kalpeshmaheshwari