Hii, 

I am using Odoo 12. Our customer (User Type: Portal), when he login to our odoo customer portal, there is no any previous document listed. Like he has paid to some Sales Orders but there is no any sales order or invoices he has already paid. Instead there is message "There are currently no quotations for your account." 

But when our customer receives Sales Quotation email from odoo and clicks the button Sign and Pay from the email, then  he can see the detail of the sales quotation. He can sign and pay online. But if he login again later he cant see any Sales order or invoices. 

We want customer should see its sales in invoice history.

Is there any setting missing or what could be the reason?

Thanks