There are a lot of comments that are essentially answers, like this.
It means that someone with authority signed off on your invoice as authoritative and that your demand for payment, as documented by your invoice, moves forward toward your goal of being fully paid - a goal which will be achieved when everyone with the requisite authority and responsibility has signed off on your invoice. If it sounds bureaucratic and deliberate, that's because it is bureaucratic and deliberate. They weren't going to liberate your money just on your say-so, right? :) – Vietnhi Phuvan 43 mins ago
Thanks, Vietnhi! So what do I actually put in the boxes? Where my guesses correct? – invoicehelp 42 mins ago
You don't get to fill in the boxes! For the same reason that I'd get rich if I got to approve my own invoices :) Submit your invoice to your client. Either your client fills in the boxes because your client has the authority, or your client passes on the invoice to someone in the client's hierarchy who has authority to liberate your money. But you gotta take the first step amd submit that invoice to your client :) – Vietnhi Phuvan 37 mins ago
I could take those two comments and make them into a halfway decent answer. Is that appropriate? (In this case, I don't actually know enough to make an answer on my own, so perhaps it shouldn't be me using the comments. On the other hand, the OP seems to think the comments/answer is helpful.)
This meta question starts from the person asking the question, how to respond when the answer is in the comments. This question is from the view of someone coming across a question where there isn't an answer yet, except for in the comments, and those comments appear to be at least the start for a good answer. Perhaps the answer for both this and that are the same, and this should be considered a duplicate.