From We Card's long standing tool for cashiers, the Age of Purchase Calendar to our Smartphone App "Age Checker" and the age calculation tool website — wecardnow.com, there are multiple options to consider.
ID Scanners (handheld or with a stand) work with your POS to scan ID barcodes. They help reduce employee "carding" errors. An evolving technology with varying features based upon different POS systems. How it Works - Free Download