Any written agreements or contracts entered into between buyer and seller which state terms and conditions of sale such as guarantees and performance requirements should be developed with the advice of an attorney. (oldenglishsheepdogclubofamerica.org)
The goal is to get an accurate read on the progress and condition of your sales pieces. (entrepreneur.com)
Unless that is, they've got a published returns policy allowing it — then it's a contractual condition of sale, so they must obey it. (moneysavingexpert.com)