# Automatic Invoice Numbering

### Automatic Invoice Numbering

By default, the Secure Payment application's payment module automatically assigns an invoice number for each transaction processed. You cannot process a transaction without an invoice number, which then appears on the transaction receipt. You can choose to disable automatic invoice numbering but the terminal will prompt the operator to input an invoice number manually (with a maximum of 12 numeric characters).

#### **To enable or disable the automatic invoice numbering:**

1. From the main screen, touch **Settings**.

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![Settings button](https://documentation.payfacto.com/SecurePayment/Pay/UG/CA-EN/assets/images/Pay/MainSaleScreen_SettingsButton.png)

2. Enter the merchant password and touch **Confirm**.
3. Scroll to the **Configure application** section.
4. Touch **Terminal options**.
5. Scroll to the **General** section.
6. Enable the use of automatic numbering by toggling the **Automatic invoice number** switch to the right.
7. Disable the use of automatic numbering the **Automatic invoice number** switch to the left.
8. If you have more than one terminal, repeat steps **1** to **7** for each additional terminal where you want automatic or manual invoice numbering.