| Variable | Description |
|---|---|
| %AMOUNT% | The total payment amount, including the fee if applicable. |
| %JUSER_ID% | The Joomla user ID of the logged in user, if any. |
| %JUSER_NAME% | The name of the logged in user, if any. |
| %JUSER_USERNAME% | The Joomla username (login name) of the logged in user, if any. |
| @@FIELD_NAME@@ | The value of a custom user field for the logged in user, if any. For example @@MEMBER_ID@@ would retrieve the value of the custom field MEMBER_ID. |