I scanned my 19 books, agreed on a price, printed the shipping label, boxed up the books and mailed them to Ziffit. In early June, they verified receipt of the books I mailed. On June 10th, they sent an email stating that a bank transfer payment would be in my checking account in 3-5 working days. As of July 6th, I have received nothing. I have emailed Ziffit 16 different times requesting ANY kind of documentation that this payment was sent (a screenshot or last four digits of the account payment was deposited to). I receive very generic responses from customer service reps Alan and Sean that never address my request for proof. They refer to their "Finance Department" in those emails but never offer to connect me with someone in that group and totally ignore my request for proof of payment. I am forced to recognize that I have been scammed by this illegitimate company. Any company that actually had a "Finance Department" would have proof of payment. If not for customer service purposes, then for tax purposes. Let this serve as a warning to anyone thinking of doing business with Ziffit.