In order to protect your form from unwanted submissions, you can password protect them so that only users with the password have access to the form.
To add Password Protect your forms:
Go to Settings and select General. Once in the General pop up window, scroll until you reach the Password Protect section.
2. Next, enter the password you'd like to create for the form and then select Save.
3. Then, when your users access the form in the Live View they will be prompted to enter a password before moving forward to the form.