Great question!
Yes — your email account is required to register yourself in the Serea App. Within the app, your account is linked both to your email address and to your Serea lock once you’ve paired it.
However, the main key to your Serea lock is actually your PUK Code Card.
So, if you’ve lost access to your email account (for example, if it was hacked), just follow these steps:
Create a new account in the Serea App using your new email address.
Use your PUK Code Card to pair your lock again.
You’ll then receive a confirmation that your lock can now be opened with your new account, and that the previous account no longer has access.