[Astronaut3315]

I just bought a refurbished HL-L8360CDW, a current model. It reads a physical toner reset gear on each cartridge. Resetting the toner is a matter of adding a missing gear (starter cartridges) or turning it to the reset position (retail cartridges). The printer has absolutely no way to know if a cartridge is genuine or reused.

The starter cartridges even come from the factory with a fill port covered by a removable plug.

The above applies to Brother printers that use TN43x series cartridges. Cheaper models have the reset chip dance.