Before you send an invoice or confirmation, the send window's preview shows exactly who it will go to. If nothing would go out, the preview says so and explains why. Check here when a client says they didn't get a message.
Where the send window opens
The send window opens on any message you send by hand:
Sending the invoice when you save a new booking
Confirming a booking and sending the confirmation
Resending an invoice reminder — open the booking, scroll to Payments Due, click the arrow beside View invoice, and select Resend invoice reminder
Resending a confirmation — same arrow beside View invoice, then Resend confirmation
Check the recipients
Open the send window.
On the Email template tab, check the To line above the email preview. It shows the name and address the email is going to, along with anyone you've added under Cc.
Click the SMS template tab to check the text message the same way.
If a message won't be sent
Instead of the recipients, the preview shows a yellow banner with the reason:
This email won't be sent — usually the client has no email on file. Enter an address in the Email address field on the right. See How to Send an Invoice to an Alternate Email Address.
This text won't be sent — the client needs a phone number that has agreed to texts.
The message is turned off — in your notification settings, or in this booking's communication settings. See Manage Communication Settings for a Booking.
Good to know
The preview shows exactly what the send will deliver, so what you see on each tab is what goes out.