C# Class PayPal.Api.Invoice

Cancels a sent invoice, by ID, and, optionally, sends a notification about the cancellation to the payer, merchant, and Cc: emails.

Cancels an invoice.

Creates a draft invoice. You can optionally create an invoice [template](/docs/api/invoicing/#templates). Then, when you create an invoice from a template, the invoice is populated with the predefined data that the source template contains. To move the invoice from a draft to payable state, you must [send the invoice](/docs/api/invoicing/#invoices_send). In the JSON request body, include invoice details including merchant information. The `invoice` object must include an `items` array.

Note: The merchant specified in an invoice must have a PayPal account in good standing.

Deletes a draft invoice, by ID. Note that this call works for invoices in the draft state only. For invoices that have already been sent, you can [cancel the invoice](/docs/api/invoicing/#invoices_cancel). After you delete a draft invoice, you can no longer use it or show its details. However, you can reuse its invoice number.

Deletes a draft invoice, by ID. Note that this call works for invoices in the draft state only. For invoices that have already been sent, you can [cancel the invoice](/docs/api/invoicing/#invoices_cancel). After you delete a draft invoice, you can no longer use it or show its details. However, you can reuse its invoice number.

Deletes an external payment, by invoice ID and transaction ID.

Deletes an external refund, by invoice ID and transaction ID.

Generates the next invoice number that is available to the user.

Shows details for a specified invoice, by ID.

Lists merchant invoices. Optionally, you can specify one or more query parameters to filter the response.

Generates a QR code for an invoice, by ID.

The QR code is a PNG image in [Base64-encoded](https://www.base64encode.org/) format that corresponds to the invoice ID. You can generate a QR code for an invoice and add it to a paper or PDF invoice. When a customer uses their mobile device to scan the QR code, he or she is redirected to the PayPal mobile payment flow where he or she can pay online with PayPal or a credit card.

Before you get a QR code, you must:

1. [Create an invoice](#invoices_create). Specify `[email protected]` as the recipient email address in the `billing_info` object. Use a customer email address only if you want to email the invoice.

2. [Send an invoice](#invoices_send) to move the invoice from a draft to payable state. If you specify `[email protected]` as the recipient email address, the invoice is not emailed.

Marks the status of a specified invoice, by ID, as paid. Include a payment detail object that defines the payment method and other details in the JSON request body.

Mark the status of the invoice as paid.

Marks the status of an invoice, by ID, as refunded. In the JSON request body, include a payment detail object that defines the payment method and other details.

Mark the status of the invoice as refunded.

Sends a reminder about an invoice, by ID, to a customer. In the JSON request body, include a `notification` object that defines the subject of the reminder and other details.

Reminds the payer to pay the invoice.

Lists invoices that match search criteria. In the JSON request body, include a `search` object that specifies the search criteria.

Sends an invoice, by ID, to a customer.

Note: After you send an invoice, you cannot resend it.

Sends a legitimate invoice to the payer.

Full update of the invoice resource for the given identifier.

Fully updates an invoice, by ID. In the JSON request body, include a complete `invoice` object. This call does not support partial updates.