The coffee machine code is a series of 14 or 16 numbers that is located directly next to the name of the machine. It can be found on the registration card inside the package or, alternatively, on the ID sticker attached to your coffee machine.
The two images are for illustrative purposes only. They serve to demonstrate the two types of sticker that you might find.
For further information, contact Lavazza A Modo Mio customer service.
Remember to remove the sticker from your coffee machine and stick it in the instruction manual for any future assistance needs.