It’s possible to set up the patron registration form to either allow or disallow users to enter multiple email addresses for a single patron, separated by a comma.

To do this, go to Administration → Local Administration → Library Settings Editor. Search for the setting called ui.patron.edit.au.email.regex.

If you’d like to allow multiple email addresses, set this value to (?:(?:\b[@,\s]@[^@,\s]\.[^@.,\s]+\b)(?:,\s?(?!$)|$))*$

If you’d like to disallow multiple email addresses, set this value to (?:\b[@,\s]@[^@,\s]\.[^@.,\s]+\b)$

In addition to the standard "show" and "suggest" visibility settings, the guardian field has a library setting called 'ui.patron.edit.guardian_required_for_juv' ("GUI: Juvenile account requires parent/guardian"). When this setting is set to true, a value will be required in the patron editor when the juvenile flag is active.

Patrons who wish to authorize other people to use their account may now do so via the OPAC. In the Search and History Preferences tab under Account Preferences, a section labeled "Allow others to use my account" allows patrons to enter a name and indicate that the specified person is allowed to place holds, pickup holds, view borrowing history, or check out items on their account. This information is displayed to circulation staff in the patron account summary in the web client. (Staff may also add, edit, and remove entries via the patron editor.)

You can use the library setting called "Allow others to use patron account (privacy waiver)," to enable or disable this feature.