We can check the delivery status of the transaction to confirm whether the invoice was sent to your client, @colin35.
Here’s how:
- Go to the Customer & Leads menu and select Customers.
- Open the customer’s profile to view the Transaction List.
- Locate the invoice you are referring to and check its delivery status in the Status column to see if it is marked as sent or undelivered.

- You can also click on the transaction to expand it and review the Invoice Activity.
If you have confirmed that the correct email address for your client is listed, you can advise them to check their Junk or Spam folders.
Additionally, you can follow the troubleshooting steps outlined in this article if your customers are still not receiving your emails: 3 Solutions for When Customers aren't receiving your emails.
We will keep this thread open if you need further assistance managing your invoices. The Community is always available to help.