Google forms limit responses to one
In some cases, you may want to limit the user’s ability to respond only once. (One user can respond to the form only once). This limit will be especially useful in case of voting forms. This feature comes with one limit that the user has to signup/login to Google before responding. This is because Google uses the user login to keep track of who submitted the form already. Making your form limited to one response Go to the settings by clicking on the ‘settings’ icon on the top right