Smokerstore Authentication

[Genghis Fogs]

Does anyone know how to use the authentication check on smokerstore?
https://www.taifun-check.de/
I've spotted a GT4 base for sale and what to double check it, but I can't figure out the difference between the verification code and serial number.

 

[Genghis Fogs]

Don't worry folks, I've figured it out