| Word | Description |
| Mail-Merge | When configuring emails, variables can be specified and will be replaced with client specific values. |
| Manual Billing | A client with billing type "manual" has no credit card on file, and transactions never reach your merchant account or bank. This allows you to manage clients who pay by check, wire transfer, etc within Billing Circle. |
| Merchant Account | A merchant account facilitates communications between the Gateway, and the credit card establishment such as Visa or American Express. |
| My Account | Billing Circle supports a login area for your clients to view their billing information, update their details, and manage their account. This area is referred to as the "My Account", or "Client Login" area. |