You can watch the video tutorial, which provides a step-by-step guide through the process.
You can remove the email addresses of your customers from invoices by following the simple steps below:
Step 1: Open Simple Invoice from the “Apps” section of your Shopify store.
Step 2: Click on “Templates” in the Simple Invoice dashboard.
Step 3: Click on the ‘Options’ section, and deselect the ‘Show Shipping Email’, the ‘Show Billing Email’, and the ‘Show Customer Email’ options under the ‘Order Details’.
Step 4: Please click the “Save” button to confirm your changes.