Configuration

Under Invoicing > Configuration > Settings enable "Auto Post Invoice" and "Auto Send Invoice" to auto post and send invoice by email to customer.

Confirm Sale Order.

After confirming the sale order delivery order will be created.

Delivery order

After validating delivery order invoice will be automatically created for delivered quantity of the product.

Invoices smart tab.

After validating delivery order,an invoices smart tab can be seen inside order page

Customer Invoice

User can see invoice is validated automatically and sent message is linked with chatter which is sent to customer.

Email send to the Customer

Customer will get auto invoice email on delivery validation.