TM6: To check the serial number of your Thermomix® TM6, simply open the Menu by touching the '3-lines' at the top left of the screen and then proceed to 'Settings' on the display. Lastly, scroll down and choose the option 'Thermomix® Version & Update' to get to the serial number.
TM5: You can also find it by going to the Menu> Help> About Thermomix
The serial number of all Thermomix models can be found on the type plate, located on the lower housing of the machine.
If you need further assistance, please contact us at https://service.thermomix.com/hc/en-us/requests/new. Our Customer Happiness agents will get back to you in 1-2 business days.