Our accounts department hate dealing with PN - for each employee that we provide ADSL for, our accounts team have to log into the portal every month to retrieve the invoice.
At one time we had 6 accounts with PN.
Think about how long it takes to dig out the password details (remember that you know yours because its yours, and you only have one account - you don't have to go to a filing system to dig out the info)
Then log into the portal.
Then navigate to the invoice, and print it or save it.
Then repeat another 5 times.
We process thousands of invoices a month, yet the 6 from PN probably take longer to process per invoice than any other (correct/matching) invoice.
And yes, before you ask - the utilities companies do email us our invoices.
Orange don't email me the invoice, they post it instead, and allow me to log in to analyse the invoice further if required.
Originally we had hoped PN might develop an account to allow us to umbrella our business accounts together, such that we'd only need to log in once a month to a single portal to retrive the bill.
This wasn't possible though, so we had hoped the emailing of the invoice to a billing email address would be a happy medium.
We have no security concerns with somebody sending us invoices this way - we regularly process our invoices (for a c£35m business) both inward and outward via pdf's or other electronic format.