How do i stop notifications from facebook to my emails i then get multiple emails for same notification?

Facebook can send you notifications via email or text for almost every possible interaction on its website. The notifications can alert you if you've got a new message, were mentioned in a post, tagged in a photo or comments on your wall; among other things. You'll also see these interactions when you log in to Facebook. If you wish to remove certain notifications, you can opt out by editing your notification settings. Pop-up notifications that appear while you're logged in can be deleted immediately.
1. Log into your Facebook account.
2. Click the "Account" link, located at the top right corner of the page. Click "Account Settings" from the drop-down list that appears. The "Account Settings" page is displayed.
3. Click "Notifications" from the menu on the left side of the page. The "Notifications Settings" page is displayed.
4. Scroll to the "All Notifications" section of the page. A list of all notifications types appears, each with a check box next to it. Notifications you are subscribed to will have a check in the box, either under the "Email" column or the "Mobile" column.
5. Click the checked box next to each notification type you wish to remove. This will remove the check mark from the box and remove you from receiving the selected notification.

Facebook can send you notifications via email or text for almost every possible interaction on its website. The notifications can alert you if you've got a new message, were mentioned in a post, tagged in a photo or comments on your wall; among other things. You'll also see these interactions when you log in to Facebook. If you wish to remove certain notifications, you can opt out by editing your notification settings. Pop-up notifications that appear while you're logged in can be deleted immediately.
1. Log into your Facebook account.
2. Click the "Account" link, located at the top right corner of the page. Click "Account Settings" from the drop-down list that appears. The "Account Settings" page is displayed.
3. Click "Notifications" from the menu on the left side of the page. The "Notifications Settings" page is displayed.
4. Scroll to the "All Notifications" section of the page. A list of all notifications types appears, each with a check box next to it. Notifications you are subscribed to will have a check in the box, either under the "Email" column or the "Mobile" column.
5. Click the checked box next to each notification type you wish to remove. This will remove the check mark from the box and remove you from receiving the selected notification.

Click the down arrow at the top right of your homepage and select Settings
In the left menu, click Notifications
Go to Email and click Edit
Choose if you want to receive all notifications, important notifications or only notifications about your account, security and privacy

From the Facebook help page:

1. Go to your notification settings>Email
2. Click Edit
3. Choose if you want to receive all notifications, important notifications or only notifications about your account

This sounds like a glitch with Facebook. I'd turn off facebook email notifications and then block the person. Let it go a week or so without email notifications before turning them back on. If you're experiencing this issue with facebook notices on a mobile device, it could be you had an unread message or notification from this person and because of a glitch with a beta update, the notifications are stacked with the oldest unread notification coming first. I'd uninstall the facebook app and reinstall with the latest version.

Also clear all related cookies and caches, PC and mobile device, that may have related facebook information.

Go to your Facebook settings page and click Notifications in the left column.
Next go to your applications, and you will see an envelope with a number next to them. Click the Edit button associated with them, and you can unclick what you do not want to receive emails for. Make sure to Save Changes at the bottom.

To control what email notifications Facebook sends to you, simply go to the "Notifications" tab of the Account page.

If the notification is from an application, you can block any application on Facebook. To block an application, navigate to the application’s about page. At the top right of the page will be a "Block Application" option.

my Hero had to be reset at the carrier's end about a week after i got mine. I would start with that.

Go to your settings>notifications then scroll down the list and tick or untick the boxes corresponding to the email/mobile notifications you would like to add or remove.

Hope that helps. Come back if you need additional info.

Thanks!