Allergen Disclosure on Digital Menus and Menu Boards: What the Law Requires

Restaurants, cafés, and food service businesses are required to provide allergen information for non-prepacked food. Digital menu boards, QR code menus, and online ordering platforms are all valid channels for this disclosure — but what they must show and how it must be accessible are defined by law.

The UK Requirement for Non-Prepacked Food

Under UK food information regulations, allergen information for non-prepacked food must be:

• Available before purchase
• Accurate
• Accessible to customers who ask for it

It does not need to be displayed prominently on every menu item by default (unlike EU requirements in some contexts), but if a customer asks, the information must be available and accurate.

Digital Menu Boards: Practical Approaches

Digital menu boards can display allergen information via:

• An allergen key on the display itself
• A link to a printed allergen information sheet
• A QR code linking to a digital allergen page
• Staff direction to a dedicated allergen information source

The key requirement is that the information is accessible before purchase — a customer must be able to check allergen content before ordering.

Online Ordering Platforms

For food ordered online (via your Shopify store, a delivery app, or your own ordering system), allergen information should be visible on the product or menu item page before the customer adds it to the cart. This is both a legal requirement and a conversion best practice — customers with allergies will abandon orders if they cannot confirm allergen content.

Display allergen information directly on your Shopify menu and product pages with Allergen Matrix at saltai.app.

The 14 Regulated Allergens and Why Accuracy Matters

UK food law requires disclosure of 14 specifically regulated allergens: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, nuts (including almonds, hazelnuts, walnuts, cashews, pecans, pistachios, macadamia nuts, and Brazil nuts), peanuts, sesame, soya, and sulphur dioxide and sulphites. These are not arbitrary categories — they represent the allergens most commonly associated with severe and life-threatening reactions in the UK population. Your disclosure system, whether digital or physical, must be accurate against this defined list and must reflect the actual ingredients in each dish you prepare and serve.

Accuracy is not just a legal obligation — it is a direct safety matter. A menu board or digital allergen page that lists incorrect information, or that reflects a previous version of a recipe, creates a genuine risk of harm to customers with allergies or intolerances. This is particularly relevant for businesses that update their menus seasonally, source ingredients from multiple suppliers, or prepare dishes with variable components. Your allergen information must reflect what is actually in the food on the day it is served, not what was in a recipe six months ago.

The practical implication is that any system you use to display allergens digitally must be easy to update. If you are managing allergen disclosures in a spreadsheet or a static PDF linked from your menu board, the risk of an outdated version being visible to customers is real. Businesses operating digital menus through Shopify or similar platforms should look for tools that allow allergen data to be updated centrally and reflected across all customer-facing surfaces immediately — rather than requiring manual updates to multiple separate documents or displays.

Written Information Versus Oral Communication: What the Law Allows

UK regulations do permit a specific approach where allergen information is provided orally rather than in writing, but only under tightly defined conditions. If a food business chooses to communicate allergen information verbally through staff, there must be a clear written notice — visible to customers before they order — explaining that allergen information is available by asking a member of staff. This notice cannot simply be assumed; it must be displayed somewhere the customer will see it before making their ordering decision. Relying on oral communication without this written notice in place does not meet the legal standard.

The practical limitation of oral communication as a primary allergen channel is significant. Staff knowledge must be consistently accurate, staff must be available at the point of ordering, and the information provided must match the actual ingredients in the dish. In busy service environments — particularly counter-service cafés, market stalls, or high-volume restaurant settings — relying on verbal communication alone creates operational risk. A customer who is not confident in the accuracy of verbal allergen information may simply choose not to purchase, which is both a safety failure and a commercial one.

For businesses using digital menus, QR codes, or online ordering, the expectation is increasingly that written allergen information will be available in a format customers can access independently. This is especially true for online orders, where there is no staff member present in the interaction. Providing written allergen disclosure on each menu item or product page is the most robust approach for digital channels, and it removes dependence on staff availability or knowledge at the point of sale.

QR Code Menus: Compliance Considerations and Common Mistakes

QR code menus became widespread during the pandemic and have remained a common format in cafés, restaurants, and casual dining settings. From a compliance standpoint, a QR code menu can satisfy allergen disclosure requirements — but only if the destination page actually contains accurate, complete allergen information for every item on the menu. A QR code that links to a PDF menu with no allergen data, or to a landing page that simply lists the business's phone number, does not meet the standard of accessible allergen information available before purchase.

One common mistake is treating the QR code menu as a design asset rather than a compliance tool. Businesses often create attractive digital menus with photography and item descriptions but omit allergen data entirely, assuming customers will ask staff if they need to know. Where no written notice directing customers to ask staff is present — and where the digital menu itself contains no allergen information — this approach creates a clear compliance gap. The QR code menu, in this scenario, is the only information the customer receives before ordering, and it is insufficient.

A well-structured QR code menu should present allergen information at the item level, either by displaying a completed allergen grid, using a standardised set of allergen icons, or providing a clearly labelled link to a dedicated allergen information page. The destination must be accessible on a mobile device without requiring a login, download, or account creation. Any friction in accessing the allergen information undermines both the compliance value and the customer experience for people who genuinely need that information before they can safely order.

Managing Allergen Data Across Multiple Menus and Seasonal Changes

One of the most underestimated operational challenges for food businesses is maintaining consistent allergen data when menus change. Seasonal menus, daily specials, supplier substitutions, and recipe adjustments all create points at which allergen information can fall out of sync with what is actually being served. For businesses with multiple customer touchpoints — a physical menu board, a QR code menu, a Shopify online store, and a delivery platform listing — a change to a single dish can require updates across four or more separate systems, each of which may be managed by a different member of the team.

The risk created by this fragmentation is not hypothetical. A dish that previously contained no nuts may be reformulated with a sauce from a new supplier that includes almond paste. If the allergen information on the digital menu board is updated but the Shopify product page is not, a customer ordering online has been given inaccurate information. The same risk applies in reverse: a dish may be reformulated to remove an allergen, but if the old information remains visible, customers with that allergy may unnecessarily avoid a safe option — or worse, lose confidence in the accuracy of your allergen disclosures generally.

The most effective approach is to manage allergen data from a single source that feeds all customer-facing displays. Where that is not technically possible across all platforms, businesses should maintain a documented update process that identifies every location where allergen information appears and requires sign-off when any recipe or ingredient changes. For Shopify-based menus and ordering systems, tools like Allergen Matrix allow allergen data to be managed centrally and displayed consistently across product pages, reducing the risk of version mismatches between your online menu and your kitchen's actual recipes.

Staff Training as a Complement to Digital Disclosure

Digital allergen disclosure does not eliminate the need for staff training — it complements it. Customers who have reviewed allergen information online or on a menu board may still approach staff with follow-up questions, particularly where they have multiple allergies, where they are ordering for someone else, or where they want reassurance that kitchen preparation practices minimise cross-contamination risk. Staff who cannot answer these questions accurately, or who direct customers back to a digital source without engaging with the question, undermine the confidence that good allergen disclosure is designed to build.

Training should cover not just the 14 regulated allergens and how to find allergen information for each dish, but also how to handle escalated queries — when to involve a manager or chef, how to communicate uncertainty honestly, and what to do if a customer reports a reaction. The legal requirement for accurate allergen information applies to the answer a staff member gives as much as it does to a menu board display. A verbal answer that contradicts accurate written information creates confusion; a verbal answer that is simply wrong creates risk.

The interaction between digital disclosure and staff knowledge is also important for building customer trust with allergic diners. A business that displays clear allergen information digitally and also has staff who can speak confidently about ingredients and preparation is far more likely to retain customers with allergies than one that relies entirely on a QR code and offers no further engagement. Allergen-aware customers are often loyal customers — they return to places where they feel safe, and they recommend those places to others in their community.

Try Allergen Matrix free at saltai.app — no credit card required.