Concept
Along with addresses, availability and preferences, certification hints appear above people in lists when you hold your mouse over them for a few seconds. This tool allows you to define which background checks will be displayed and which will alert for expired or missing certifications.
How to use
For each type of person, in the first column select from the drop-down menu which background checks and certifications to display. In the second column select any background checks or certifications for which you want alerts. If any certifications of these types are either not present or are expired, an alert will show in red as part of the hint for that person.