Just have a comment on the invoices received in the mail. They resemble the (pardon the term) junk mail that you send out and can end up in the recycle box, unopened. You should either change the look of the invoices or quit sending so much unsolicited junk mail.
LOL. I used to save the junk from Comcast out of shock at how much they send. There should be huge fines for sending out excessive unsolicted junk mail. The money could go to paying people to clean up parks or something.