def METHOD_NAME(self):
    if api.portal.get_registry_record('plone.request_access_enabled', default=False) is False:
        return []
    system_email_address = api.portal.get_registry_record('plone.system_email_address', default='')
    access_request_email_addresses = api.portal.get_registry_record(
        'plone.request_access_form_email_addresses',
        default=system_email_address,
    )
    return list(set([
        email.strip()
        for email in access_request_email_addresses.splitlines()
        if len(email.strip()) > 0
    ]))