What must a server do before serving alcohol to a customer?

A server must verify the customer’s age before serving alcohol to ensure compliance with legal regulations. This practice is crucial as it protects both the establishment from potential legal liabilities and ensures the safety of customers by preventing underage drinking. Verification typically involves checking a valid form of identification, such as a driver's license or state-issued ID, to confirm that the individual is of legal drinking age. This responsibility is mandated by laws in most jurisdictions, reflecting the importance placed on maintaining responsible alcohol service in social settings.

The other options do not align with responsible beverage service practices. Checking inventory is a matter of stock management rather than customer safety. Serving drinks based on appearance can lead to discrimination and is not a reliable method to assess age or eligibility for alcohol service. Confirming a customer's drinking history is also impractical and irrelevant, as it does not directly relate to age verification and could violate privacy rights.