An online petition (or Internet petition, or e-petition) is a form of petition which is signed online, usually through a form on a website. Visitors to the online petition sign the petition by adding their details such as name and email address. Typically, after there are enough signatories, the resulting letter may be delivered to the subject of the petition, usually via e-mail. The online petition may also deliver an email to the target of the petition each time the petition is signed.