From the Sunlight Foundation:  A TV ad-buying company with close ties to Republican Party leaders reserved a whopping 1,326 spots in the Denver market this fall, but the station receiving the $740,070 contract removed it from public view when a reporter tried to learn who was footing the bill.

The deleted ad reservation at Denver’s KMGH Channel 7 came from Target Enterprises, a Los Angeles-based firm whose client list includes top Republican candidates and well-known conservative groups. Target is one of the most adamant opponents of efforts by the Federal Communications Commission and political accountability groups, including the Sunlight Foundation, to make public information about who is buying political ads.

Disclosure rules require details about requests for ads that target federal candidates, but not issues that are purely local. There’s little enforcement of these rules, though, so national advertisers often file paperwork that erroneously claims their ads aren’t national. Earlier this year, Sunlight and Campaign Legal Center with help Georgetown University’s Institute for Public Representation filed a dozen complaints about TV stations leaving out these details required for ads that are national in scope — including one against KMGH.

Visit the Sunlight Foundation for more.