To verify your phone, our team may ask for a photo of it after you've filed a claim with the ID of your device visible on the screen.
When you take this photo, be sure it is not a screenshot, and captures the entire screen so any and all damage can be seen as well.
Here is an example photo that shows your device ID on the "Claims" page within your account:
Here is an example photo that shows your device ID on the login page: