You don't necessarily have to send invoices to your customers in separate emails. Instead, your online store can include links to view, download, print, or pay your invoices online. There are different ways you can link to your Sufio invoices.
Notification emails sent by Shopify
Add links to invoices in the Order Confirmation emails sent by Shopify.
Add links to an invoice in the POS receipt email sent by Shopify.
Pages on your Shopify store
Insert links to invoices on the Shopify customer account page.
Link to an invoice on the final page of the Shopify store checkout.
Emails sent by Shopify apps
Add links to your invoices in the automatic emails sent by Klaviyo.
Add links to your invoices to your automated emails sent by Omnisend.
Add links to your invoices to your emails sent by Recharge.