How to send digitally signed invoice?

Hello there, gaurav.efl.

While the option to electronically sign an invoice within the system, you can look for a third-party application that you can integrate into QuickBooks. Let me show you how: 

1. Go to our Apps Center.
2. Find an app.
3. You can look into the Overview on how the app works and the Reviews of some users.
4. Click Get app now to subscribe to the app. 

You may want to use this article as a guide in customising invoices, estimates, and sales receipts in QuickBooks Online. For QuickBooks products update, you can check our blog website anytime.

Let me know if there' anything else that you need help with. Take care!

@gaurav.efl 

You may need an additional app to do so.