Classified Ads exposes three tokens, all of them based on a user object:

- `classified-ads`: a themed list of Classified Ads created by the user, up to a limit of 10 ads. Best for web pages
- `classified-ads-plain`: a plain text list of Classified Ads by the user (max 10). Best for email notifications and Drush commands.
- `classified-ads-url`: the URL of a user's ads list. Can be used to point to their page on the site, from another page or a notification email.

The optional `classified_notifications` module uses these tokens, and its code in function `classified_notifications_mail()` can be used as an example of how to use them, as default notification messages include such tokens along with core tokens. These default messages are defined in file `classified_utils.inc`, function `_classified_get_vars()`.