Hello, I have an other solution : It's to override the PDF class HTMLTemplatesInvoice.php to change this :
by this :
and on your invoices you can see the phone number in delivry adress.
And this new params PS_INVCE_INVOICE_ADDR_RULES and PS_INVCE_DELIVERY_ADDR_RULES it is not use in the HTMLTemplateDelivrySlip.php Why ? Good question ?
Bye