From the device home screen, select the View Logs option on the bottom of the screen.
Your logs will then pop up and you will see a button on the top of the display called certify.
Select this and you will have the option to certify all your logs, or certify the 24 hour period displayed.
Select the certify 24 hour option and the next screen will ask you to agree to the message stating that the logs entered are true and accurate.
After selecting Agree, the logs have been certified, and you can select Done to take you back to the home screen.