I have an E-Flow account with yourselves for the M50 (no tag). I receive an invoice from you every month regardless of whether or not i used the toll. My question is, would it be possible to cancel the paper invoice and go to E-Mail instead? Once I'm happy with the invoice i just rip it up and throw it in the bin anyway. It'll be one less item of post for me to bin and i suppose it'll save yourselves some money too.