I need to deliver via web, xlm and pdf files (electronic invoices)
Two ways to deliver.
1. The customer logs in with username and password then he sees all his invoices and can download any.
2. The visitor does not log but enters the invoice number and company ID, without identifying himself,
Then the site shows the content of that particular invoice and allows to download both formats PDF and XLM.
Is there an already finished product that can do this for us?
or which is the best company you would recommend to develop it.