Did you know that up to 30% of a company's products might be returned by customers? Not just because of faults. For example, a customer (bad customer!) unsure what size will fit her best might order two sizes of clothing from a mail order retailer, returning the item she doesn't want.

Many mail order retailers facilitate this by providing free postage for returns. Neither are bricks and mortar retailers or wholesalers immune from customers changing their minds, and in the interests of long term relationships, will accept returns for credit or refund.