HRoth - 9:57 pm on Oct 30, 2007 (gmt 0)

I tell such customers that I require a signature confirmation on large orders. If they say they don't need that, I say I need it for my credit card processor. If they won't do it, I void the order.

I did end up offending some company once that placed a huge order for all the same item, which is a huge red flag in my experience. I called and asked for the name of the issuing bank and the customer service phone number from the back of the card (this was before many people were using the cvv). One person I communicated with there got mad and wanted to cancel the order. They still bought the stuff, but after that I never called a customer about a charge again. I just void it if I don't feel right about it.