Consumer Reports says its secret shoppers purchase all tested products at retail prices on behalf of the organization, that they do so anonymously, and that CR accepts no free samples in order to limit bias from bribery and to prevent being given better than average samples. Consumer Reports pays a rental fee to manufacturers when using these press samples and does not include the products in its ratings. For most of "CR"s history, it minimized contact with government and industry experts "to avoid compromising the independence of its judgment". In 2007, in response to errors in infant car seat testing, it began accepting advice from a wide range of experts on designing tests, but not on final assessments. Also, at times "CR" allows manufacturers to review and respond to criticism before publication.