I’m always thankful to see my work published online and in print. Click on each image to see it larger.
ˈter ˌSHēt/
plural noun: tearsheets
  1. a sheet or page torn from a magazine, journal, or the like, as one containing an advertisement and sent to the advertiser as proof of publication.

From Wikipedia:

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. Tear sheets are also used by writers and photographers as proof that their article or photo was published.