Please check all your folders, especially the "Spam" and/or "Junk" section. If you still cannot find it, please add firstname.lastname@example.org to your contacts.
After that please log in to your Nexo account and go to the "My Profile -> Security" section.
Then, click on the "Resend Confirmation Email" button to request a new confirmation email. Alternatively, you can provide a new email address and click on the "Change" button to confirm your choice:
If you have not logged out since creating your Nexo account, please click on the "Click here to resend it or change your email" link.