Often a public relations release is distributed early and embargoed by prnewswire. What does that mean? News distributors are requested not to report the tale till a stipulated time. For example, distributors customarily receive a copy of presidential speeches one or two hours ahead. Product or media reviewers are typically given a prnewswire sample or preview of a product before its date of release. Unless the paper has willingly agreed to respect the embargo ahead, sometimes thru a contractually binding non-disclosure agreement, the hack is not required to respect it. Nevertheless even lacking the presence of any requirement, news distribution operators don't like to break the embargo for sources that they would like to cultivate. If they do, then the agency or customer that sent the release may blacklist them. A blacklisted reporter won't receive any more embargoed releases, or any releasesat all!. Nevertheless it is terribly tough to impose embargoes on hacks, as there's unceasing pressure by editors to scoop other news distributors. It is doubtful that a PR agency will blacklist a particular kind of media, as other clients may wish to be featured in this publication. That issue is frequently dealt with by controlling the timing of a release thru e-mail instead of counting on the correspondent to do that.