I copied a form from a friend, but we are both getting notifications in our email when form is filled out.

Please change or update the email recipient of the notification. Here's how:

1. In the Form Builder, click the "Settings" in the top menu. Go to the "Emails" section. Select the Notification and then click the "Edit" button. 

2. Go to the "Recipients" tab. Here you'll see the Recipient Emails where you can add or remove a recipient.

3. Click the "Save" button when you're done.

Related user guides: 
Setting-Up-Email-Notifications
Send-Notifications-to-Multiple-Recipients

Hope that helps. Thank you.