This block of services is designed specifically for checking MacBook devices by SN (serial number). Depending on what you want to know, we can recommend the following checks:
You can find out if iCloud Activation Lock is enabled on your MacBook and check if your MacBook will require a login and password from your Apple ID account by checking [ON/OFF].
You can check the iCloud lock status on your MacBook and check if your MacBook is listed as stolen/lost in Apple's database by checking [Clean/Lost].