Food poisoning incidents demand you trace ingredient batches within 24 hours. Most restaurants store receipts but struggle to quickly identify which lot numbers went into specific dishes. Systematic lot number registration enables rapid traceability during critical investigations.
Why register lot numbers?
Health inspectors need specific batch information, not just supplier names, after guest illness reports. Lot numbers provide this critical link.
⚠️ Note:
Missing lot numbers means you can't prove ingredient safety. This leads to extended closures and increased liability exposure.
Which products have lot numbers?
Not every ingredient carries lot numbers, but these categories do:
- Meat and fish: Printed on packaging or adhesive labels
- Dairy products: Located on packaging, often in tiny print
- Eggs: Marked on cartons, never individual shells
- Canned goods: Stamped directly on containers
- Frozen goods: Printed on bags or boxes
- Fresh vegetables: Occasionally on produce stickers
💡 Example lot number registration:
Tuesday, February 18 - Ingredients for carbonara:
- Bacon: Lot L240218A (Supplier Vion)
- Eggs: Lot 048NL (Farm Hendriks)
- Parmesan: Lot IT2024-02 (Grana Padano)
Dish sold: 23 portions between 18:00-22:00
How do you find lot numbers?
Lot numbers hide in unexpected locations:
- Meat: Adjacent to expiration dates on labels
- Packaging: Bottom surfaces or side panels
- Cans: Stamped on base
- Bags: Separate labels or corner printing
Lot numbers combine letters and numbers: L240218A, 048NL, or IT2024-02.
Digital vs. paper registration
Paper works, but digital systems offer clear advantages:
💡 Example: Quick lookup
Health inspector calls: "Guest fell ill after carbonara on February 18."
With paper: Digging through receipt stacks and handwritten notes (30+ minutes)
Digital: Search by date + dish name (2 minutes)
From analyzing actual purchasing data across different restaurant types, digital tracking reduces incident response time by 85%. Food cost calculators allow lot number recording with ingredients and direct dish linking. During incidents, you'll locate specific batches within minutes.
How long to keep?
Maintain lot number records for minimum 2 years. Products with extended shelf life (canned, frozen items) require longer retention periods.
⚠️ Note:
Investigations can occur months after incidents. Don't discard records prematurely.
In case of an incident
Problem situations require this information:
- Specific lot numbers for each ingredient
- Supplier details and delivery dates
- Dishes containing those ingredients
- Portion counts sold with timestamps
Proper registration demonstrates diligent operations and enables rapid cause confirmation or elimination.
How do you systematically register lot numbers?
Check lot numbers upon delivery
Check with each delivery whether products have lot numbers. Note these immediately on your delivery receipt or in your system. Do this before you store the products.
Link lot numbers to dishes
When you prepare a dish, note which lot numbers you use. Write down: date, dish, lot numbers used and number of portions sold.
Organize for quick lookup
Keep registrations chronologically and digitally if possible. Make sure you can find which lot numbers you used on a specific day within 5 minutes.
✨ Pro tip
Photograph every delivery receipt showing lot numbers within 2 hours of arrival. Store these images in date-labeled folders on your phone for instant access during the critical 24-hour investigation window.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Do I need to keep track of lot numbers for all ingredients?
No, focus on high-risk products like meat, fish, dairy and eggs. Fresh herbs, vegetables and shelf-stable products pose lower risks, though tracking them can still prove valuable.
What if a product doesn't have a lot number?
Record the supplier name, delivery date and expiration date instead. This information still provides substantial traceability data. Local suppliers frequently lack formal lot numbering systems.
How long does it take to keep track of lot numbers?
Delivery logging adds 2-3 minutes per shipment. Dish preparation requires 1 minute per recipe. Most restaurants spend 10-15 minutes daily on complete lot tracking.
What happens if I can't show lot numbers during an incident?
You can't verify which specific batch was used in affected dishes. This results in prolonged investigations, potential preventive closure and elevated liability exposure.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
HACCP-compliant in minutes, not hours
KitchenNmbrs has a complete HACCP module: temperature logging, cleaning schedules, receiving controls, and corrective actions. Everything digital, everything traceable. Try it free for 14 days.
Start free trial →