This message typically displays when MarkLines no longer recognizes the cookies on your computer.
This can happen if you:

1. Changed computers, haven't used MarkLines for a long time.
2. Modified browser settings or updated software, or are using an iPhone or iPad with the private browsing functions turned on.

(1) If you have recently changed computers, or are using new tablet or smartphone

Complete the Change PC form.
We will send you a notification by email within a few minutes, validating the computer change.