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.
You can setup and configure your lock using any iOS (iPhone) or Android smartphone with Bluetooth through the official Clever App. The app is free and always will be.