See our return/repair policy at the following link:

Before shipping defective devices you must deprovision the license. 

Do the following to deprovision the devices:

  1. Sign in to the Admin console at
  2. Go to Chrome devices > Devices.
  3. In the device list, select the provisioned or pending device(s).
  4. Click More Actions and choose Deprovision.
  5. In the warning message that appears, click Deprovision to complete the process.

Deprovision Chrome devices setting

More information on deprovisioning devices can be found at