you know it's going to be a bad day

So basically one of my copublishers called to announce that they weren't able to pay an invoice yet because they didn't have proof of delivery. Keep in mind that delivery should have happened last SEPTEMBER...and all shipping documents were sent to them early DECEMBER. But they just now notice that they hadn't paid our invoice (on a side note: who's keeping tabs HERE on non-payers?!). So they want *me* to give them proof of delivery. Ummm...why not just call your warehouses and ask them if a crap-load of books are there?!