Invoicing Settings API Requests {#invoicing-settings-intro}
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The Invoicing Settings API enables you to customize your invoice checkout experience, add a custom message to your email communications, and enable payer authentication. You can also retrieve the invoice settings for your payment page.

* [Update Invoice Settings](/docs/vas/en-us/invoicing/developer/all/rest/invoicing/invoicing-settings-intro/invoicing-settings-update.md "")
* [Get Invoice Settings](/docs/vas/en-us/invoicing/developer/all/rest/invoicing/invoicing-settings-intro/invoicing-settings-get.md "")
* [Update Payment Notification Email Address](/docs/vas/en-us/invoicing/developer/all/rest/invoicing/invoicing-settings-intro/invoicing-settings-custom-email.md "")