You can send invoices automatically as soon as you accept payment by following the simple steps below.
Your customers will receive an invoice as soon as they make a payment or you approve the payment. If you activate this option, you can send separate invoice emails to your customers.
Step 1: Open Simple Invoice from the “Apps” section of your Shopify store.
Step 2: Click on “Settings” on the Simple Invoice dashboard.
Step 3: Scroll down to the Sending Invoices with Simple Invoice section, and click on the Auto on payment option.
Step 4: Click on the Save button.