If an establishment is checking IDs at the door, do bartenders/servers still have a legal responsibility to check them? Why or why not?

Question

Quizplus · Accepted Answer

Even if IDs are checked at the door, any server of alcohol still has the responsibility to check IDs of customers they suspect to be underage.
If a minor is served, the entire establishment can be held liable. And the truth is that the doorman or bouncer is less likely to face criminal charges for serving minors than the person actually serving the alcohol. Furthermore, while many establishments that check IDs at the door do use bracelets or stamps to identify people who have been checked and approved, many still do not.

If an Establishment Is Checking IDs at the Door, Do