Will QuickBooks automatically send out a receipt for a credit card payment processed through QuickBooks Online?

Good day, mgrams.

Once the payment is processed, a confirmation email will be sent out followed by the receipt. If you wish to view the receipt template, you can log into your merchant account. Here's how:

1.  Log into Online Service Center.
2. Under Activity & Reports select Transactions
3. Adjust date range to locate transaction 
4. Click Gear icon to the far right of the transaction
5. Select Email Receipt from menu pop-up
6. Enter your customer's email address and send the receipt (you can also Cc yourself and add a personal message).
   

Alternatively, you can customize your sales receipt in QuickBooks Online by following the steps in this article: Customize invoices, estimates, and sales receipts in QuickBooks Online.

You might find the following articles below interesting. These will provide you steps on how to process eCheck as well as on how to access your statements from your merchant account:

Access statements in your Merchant Service Center.

Process payments in the Merchant Service Center.

If you have other questions in mind, please leave a comment below and I'll make sure to get back to you as quickly as I can.