How can we send an invoice and require it to be e-signed?

I'm happy to see you here in the Community, @elly-1entente-co.

Currently, the E-signature feature is unavailable in QuickBooks Online (QBO). It's available on the mobile app and the QuickBooks Desktop version. However, you can manually affix your signature or integrate a supported third-party app.

There are two ways to look for a third-party app. First, go to the apps.intuit.website or navigate the Apps menu in your QBO account. Let me guide you on how:

1. Go to the Apps menu.
2. Select the Find Apps tab, and then type a keyword in the search bar like "E-signature."
3. Click the magnifying glass to search, then choose the app that suits your need.

Additionally, we can capture a signature using the QuickBooks Online app. Follow the details below depending on your mobile device.

iOS:

1. From the Menu ☰, select Estimates or Invoices.
2. Select an existing transaction, or create a new one.
3. Add any necessary information.
4. Select Save.
5. Select Get Signature.
6. Have your customer sign with their finger.
7. Select Done.

Android:

1. From the Menu ☰, select Estimates or Invoices.
2. Select an existing transaction, or create a new one.
3. Add any necessary information.
4. Select Done.
5. Select Get Signature.
6. Have your customer sign with their finger.
7. Select Done.

Also, you can check this link about customizing your sales forms in QuickBooks: Learn how to personalize and add specific info to sales forms.

Fill me in if you have additional questions about the e-signature of an invoice in QuickBooks. I'm always here to help. Take care always.

@elly-1entente-co 

What kind of business do you run? You need a 3rd party app to do so.