This is an old scam which for some reason has come back into fashion the past couple of years. It's known as the ''phoner toner'', among other names. It sounds like Sue is ahead of this game, but I'll remark for the benefit of others.
The office machine supplies, if you ever receive them, will be the worst junk scraped from the back of a Chinese boat. The cost will be jacked up to maybe four times the street price of *good* supplies, and an obscene ''delivery fee'' is also likely. The scammer tries to find the one flunkie in a company who can be fooled into agreeing to a product order, and heavily edited responses from that employee will be waved in your bosses' faces as ''proof'' that a bill is owed if contested. Then will come hostile and/or illegal collection calls, probably with an even more inflated amount claimed.
The US has an old postal rule which says that any merchandise received without an order may be kept as a gift. The sender can huff and fume all he likes, but will not get any flimsy fake billing to stick. Possibly there are similar laws where you live.