In this how-to video, you will learn how to block third party applications on Facebook. On your main page, you will see requests on the right. Click on the request to check the invitation. You will be presented with a few choices. If you are never planning on accepting an invitation to the application, you can click on the Block Application at the bottom. You can also ignore all invitations from a person by clicking the link with the same name in the same page. This will make using Facebook much more hassle free. Viewing this video teaches you how to block these invitations.