Some establishments use an electronic ID scanner. This tool is best understood as:

An electronic ID scanner is best understood as a helpful aid that supports, but does not fully replace, the server's visual inspection and judgment. Scanners can quickly read and flag certain information and help detect some fakes, but a determined counterfeit may still pass, and the server must still confirm the photo and description match the person and watch for other red flags. Technology assists the process; it does not remove the server's responsibility to verify age carefully. Treating the scanner as one tool among several is the right approach.