Background check will start when they told you so..it will appear in your gckey..it will usually take few months before they start checking your background.Background check is not the only process they mean when they said they already processing your application in you local visa office.My ecas states that they started processing PA application on June 27, we also received an email that my application will be processed on my local VO. Question is, are they already processing my background check since in ecas it says that they started processing it since June 27 but my gckey states that "Your application is in progress. We will send you a message when we start your background check."