With a Target subscription, all lists downloaded from the tool will be checked every 60 days for validity. After 60 days, each list you have downloaded will be updated and you will be re-credited if any records on that list are no longer valid.
To view these updates, from your Target dashboard, click on the "Download Updates" link on the file under your "Project History" module.
If you do not have a subscription, then you can use your allotted number of credits up until your contract expires, without updates. If you are interested in a subscription, please contact Sales at (888) 318- 5245 or contact us here.