Video news releases (VNRs) have been criticized when they are used within a newscast without source disclosure because they violate ethical codes related to transparency and consumers' “right to be informed” by whom they are being persuaded. In an experiment, we show how increased persuasion knowledge about VNRs is positively related to beliefs in news commercialization, beliefs in VNR inappropriateness without disclosure, and support for disclosure of VNR material. We suggest that increased knowledge about VNRs without source disclosure measures might (...) harm messages that are not employing the tactic (“false positives”) and lead to a general distrust of all media. (shrink)