Send a reminder about being paid?
This is my first ever freelance job (for quite a big company). I sent my invoice last month, technically they have 3 days left out of the 30 to pay me, but have not seen a penny yet (and tbh really need the money).
The person I'm dealing with said that the invoice had gone to the finance department and they thought I was going to be paid last week (told me this the week before I was to expect it). Anyway, I realise they still have 3 days, but don't want to annoy them with pestering and put them off employing me ever again, but is there a way of reminding nicely? Or is that completely unprofessional considering they are still within the 30 days? Help!