Allergen Communication and Regulatory Requirements
Communication is the control point
Most allergen failures are communication failures. A candidate must understand the chain: the guest discloses an allergy, the server records it accurately, the kitchen verifies ingredients, and the information travels with the order to the person preparing and plating the food. Each link must be reliable. Servers should never promise a dish is safe without confirmation from a manager or the person who knows the recipe. If the answer is uncertain, say so honestly and offer alternatives.
Regulatory expectations
In the United States, the FDA Food Code and federal labeling law (FALCPA, updated by the FASTER Act adding sesame) require that packaged foods declare major allergens in plain language on the label. For restaurants, the practical requirements are: written recipes and ingredient lists that identify allergens, staff training on allergens, a designated person who can answer questions, and procedures to prevent cross-contact during storage, prep, and service. Many jurisdictions also expect allergen awareness training for food protection managers. Buffets and self-service areas require special care because guests share utensils; provide separate serving utensils and clear signage.
Traps to watch for
Questions love the server who "thinks" a sauce is dairy-free, or the cook who assumes a product is safe because the front of the package looks clean. Read the full label, including "contains" statements and advisory statements like "may contain" or "processed in a facility with." Another trap is assuming a menu description lists every ingredient. It does not. Also, a guest's request for an allergen-free meal is not a preference to be negotiated; do not serve a dish "just this once."
Worked example
A guest with a peanut allergy orders a stir-fry. The server checks the recipe card: peanut oil is listed. The correct response is to tell the guest the item cannot be safely prepared and offer a verified alternative, not to ask the kitchen to "pick around" the peanuts.