These people are almost as good as the fake yellow pages people at sending you a solitication that looks like a legitimate invoice.  (Sections of the form letter quoted here fall under the fair use provision of copyright law.)

"IMPORTANT
Please provide us with your current e-mail address.  Submission instructions will be sent to you when payment is processed." 

Huh???  I'm giving you my e-mail address... why???

The of course the legal BS disclaimer actually IS THERE (on the BACK side NOT the side that has HOW TO MAKE PAYMENT and PAYMENT INFORMATION and Total Amount... NOT the side you see when you first pull this masterpiece out of the envelope)... "THIS INTERNET LISTING OFFER IS PROVIDED TO MILLIONS OF WEBSITES THROUGHOUT THE UNITED STATES TO ENHANCE THEIR WEBSITE EXPOSURE. "  [Yawn... you're about ready to fall asleep here, and not likely to read on...] "THIS IS A SOLICITATION FOR THE ORDER OF GOODS OR SERVICES, OR BOTH, AND NOT A BILL, INVOICE, OR STATEMENT OF ACCOUNT DUE.  YOU ARE UNDER NO OBLIGATION TO MAKE ANY PAYMENTS ON ACCOUNT OF THIS OFFER UNLESS YOU ACCEPT THIS OFFER." [Snore.... how many of YOU actually read that last part?]

Yup imagine your a typical harried accounts payable clerk looks at this work of art stuffed in the middle of a hundred incoming invoices and only sees the big and bold "HOW TO MAKE PAYMENT" and "PAYMENT INFORMATION" on a form that looks EXACTLY like 99% of the Legitimate invoices the clerk processes...