Tear sheet
（重定向自Tearsheet）
In advertising, a tear sheet is a page cut or torn from a publication to prove to the client that the advertisement was published. Media buying agencies are often required by clients to provide tear sheets along with a post analysis of any advertising campaign. The publishers of any periodical are legally required to provide a tear sheet upon request of any advertiser. With the emergence of online advertising tear sheets often now appear in the form of a PDF file, known as a "virtual tear sheet", or "electronic tear sheet".