Every month I receive my utility bill and because my supplier doesn't provide a way to pay it online, they send me a PDF with all the usage details including a page to pay the bill. It uses a system in Italy known as "Bollettino Postale", it can be paid in person in post offices or online (Poste Italiane website).
Example:
My second requirement is to rotate a PDF (or a single page of it), I didn't find an idea so I created one (PLEASE UPVOTE THIS AS WELL !!!)
Rotate PDF Clockwise or Counterclockwise
I found that I am not the only one with a similar need (like this post), of course this is more complicated than just counting the pages but if they provide a way to rotate all the pages (instead of just a specific one) it could be beneficial.
So if you like these ideas please upvote them and if you have an idea check if someone else suggested it first and in case create it.
Personal note: there is a way to automatically pay utility bills with a bank account (like I do with my internet provider) but for this supplier I prefer to pay manually.