I would like to receive an email alert when an open invoice is paid. Does anyone know how to set up that kind of setting? Ideally for each individual invoice or all?

Thank you for trusting your concern here on the Community page, @drtraviselliott.

You'll need to enable your QuickBooks Payments preferences to receive notifications for paid invoices. I can guide you on how.

1. Log in to https://merchantcenter.intuit.com.
2. Choose Settings & Alerts under Account.
3. Select Yes under Receive Credit Card Deposit Notification in the Email Alerts section.
4. Enter the email address where you'd like to receive the notifications. For multiple email addresses, separate them with semi-colons. 
5. Enter the email address in the empty box that appears when you click a notification's Yes radio button.
6. Save the information.

You may also check out this link on how to run on or off customer notification emails for recurring payments: Turn on or off Customer Notification Emails for Recurring Payments.

Once done, you should be getting emails when your customers pay online. Let me know if you have any other questions. I'm more than happy to help. Have a great day!

Thank you Angelyn, for the attempted solution! 

Unfortunately, my account doesn't seem to have those options. I logged into the Merchant Center and chose Settings and Alerts under the Account menu.

However, I don't see an option for "Receive Credit Card Deposit Authorization."

The attached picture show what I see. 

I clicked "Save Changes" under the shown heading of "Process credit card transaction," but I wasn't really able to make any changes. Also, I've received a couple of credit card payments on open invoices since I clicked Save Changes a few days ago, and I haven't received any email notifications.  Thanks, -Travis

I have another way and I'm here to help you receive an alert after an invoice is paid, drtraviselliott.

Some of the steps provided by my colleague @Angelyn_T have already been removed. That's why you're unable to see the option. 

Usually, you'll receive an email notification within 1 hour after your client paid the invoice. If you didn't receive an email, here are the possible reasons: 

• It was moved to your Spam or Junk folder.
• You use a custom email domain (johndoe@mycompany.com) or an email client (Thunderbird, AOL, Outlook, Exchange). 
• Your internet service blocks the QuickBooks Payments email address.

Please check this article for more information: Unable to Receive Intuit Email.

However, if you're still not receiving an email, I suggest reaching out to our phone support team to investigate this further. They have the tools to securely pull up your account to check why is this happening. 

Here's how to reach them:

1. Sign in to your QuickBooks Online company.
2. Go to Help (?).
3. Select Contact Us.
4. Enter your concern, then select Let's talk.
5. Choose a way to connect with us:
   • Start a chat with a support expert.
   • Get a callback from the next available expert.

Also, processed payments are placed into a bank account depending on your deposit speed. For future reference you can read this article: Find Out When QuickBooks Payments Deposits Customer Payments. 

Reach out to us if you need anything else about invoice payments. We're always right here to help you anytime.

Good to know