To protect freedom of speech some jurisdictions have passed anti-SLAPP laws (often called SLAPP-back laws). These laws often function by allowing a defendant to file a motion to strike and/or dismiss on the grounds that the case involves protected speech on a matter of public concern. The plaintiff then bears the burden of showing a probability that they will prevail. If the plaintiffs fail to meet their burden their claim is dismissed and the plaintiffs may be required to pay a penalty for bringing the case.