The Final Draft Customer Number is the unique identifier of the software license you purchased. It’s linked in our database to your name and email address. Certain numbers and letters in it indicate what type of license you have.
Some examples* are
- KFDS-123A-456B-789C-101D -- K = Final Draft 12, S = Single User License
- EFDU-123A-456B-789C-101D – E = Final Draft 11, U = Upgrade
- XFDE-123A-456B-789C-101D – X = Final Draft 10, E = Educational
More information is here: https://kb.finaldraft.com/s/article/Where-can-I-find-my-Final-Draft-Customer-Number
*Note that these are sample Customer Numbers and they will not work in any installation of Final Draft.