Laptop sale mac?

I bought a laptop the mac address is on my name when i sell the laptop the mac address is changed and resold or is it still on my name

The Mac address is the unique identification address of a network-compatible adapter…

Where should it be stored in your name?

I bought the laptop online with my data. You can find out who bought it using the mac address. My question is what happens if you sell the laptop and someone does something about it