# Invoices and Receipts

Invoices are issued on the **first day of each month**, summarizing all services purchased or renewed during the
previous billing cycle. Each invoice includes details such as the quantity of services, applicable **NRC**
(Non-Recurring Charges), **MRC** (Monthly Recurring Charges), and any **usage-based charges** (e.g., metered calls, SMS,
or other).

Receipts are generated for every successful payment made using **Credit Card**, **PayPal**, or **Wire Transfer**, and
are sent by email after each payment.

Invoices can also be downloaded at any time from the
[Billing](../billing/monthly-invoices.html#user-panel-billing-invoice) section of the User Panel. Email notifications
are sent with the subject line: **"DIDWW: Invoice YYYY-MM"**.

By default, invoices and receipts are sent to the **Contact email** of the account **Owner** and of users with the
**Admin** or **Billing** role. Payment receipts are also sent to users with the **Commercial** role. See [Where
Notification Emails Are Sent](../../account-settings/notifications.html#user-panel-notifications-recipients).

Note

All charges are processed in **USD**. Ensure your payment method supports USD transactions.
For assistance with payments or billing, contact: [billing@didww.com](mailto:billing%40didww.com)