Sure! By setting up a separate user profile (e.g., a guest profile) and telling someone the passcode, they will be able to connect to your Clever lock and add their fingerprints using their own smartphone. No meeting face to face needed. Of course, as an administrator, you retain full control and may always delete or modify other user accounts.
Each Clever lock has an administrator (owner) account that can add or remove user accounts and view access history logs. Regular users can connect to the lock to add and remove the fingerprints associated with their profile only. Each user (including administrator) account is protected by a passcode and works like any other login system.