Send Notifications to Anyone

You can send Laravel Notifications not only to a certain user with $user->notify(), but also to anyone you want, via Notification::route(), with so-called "on-demand" notifications:

1Notification::route('mail', 'taylor@example.com')
2        ->route('nexmo', '5555555555')
3        ->route('slack', 'https://hooks.slack.com/services/...')
4        ->notify(new InvoicePaid($invoice));