Every piece of paper you have has a code embedded that if you were to write a letter that the police could find out what store it came from and with todays security camera may identify you buying so use some random paper you find and use it with pencil....
I do not know if there is an equivalent for the GDID ID as there is for the MAC address.
Reddit website forums use your MAC address to identify you.
When one of their rabid liberal free speech “moderators” bans someone and you try to log in again with a different email account and username you find you are still banned.
The answer is to use the free TMAC v6 Mac address app that can change the MAC address.
Now you can log in with a new email account and username.
Technitium MAC Address Changer
https://technitium.com
Click on the Random MAC Address button and then the Change Now! button.
And yet my bank website and numerous others cannot recall me because I use Brave with ad blocking, forcing me to get an email, or worse, a text.