How to handle a food-safety complaint or suspected food poisoning.
A practical procedure for UK restaurants and commercial kitchens when a customer reports suspected food poisoning, an allergic reaction, a foreign object or another potential food-safety problem — from recording the first report through investigation, corrective action and escalation.
Practical guidance from TKEG (The Kitchen Efficiency Group), built around everyday UK hospitality compliance and kitchen operations.
Why food-safety complaints need a procedure
A customer complaint can be an early warning that a food-safety control has failed. FSA Safer Food Better Business guidance tells caterers to take complaints seriously because they can identify problems that need to be addressed and prevented from happening again.
A complaint does not by itself prove that your food caused an illness or incident. The right response is to record the facts, protect consumers, preserve useful evidence and investigate without jumping to conclusions.
Which complaints should trigger a food-safety response?
Examples include a customer reporting symptoms of food poisoning after eating at the business, an allergic reaction, a foreign object, food that appears unsafe, incorrect allergen information or another issue suggesting a hygiene or food-safety failure.
Ordinary service or quality complaints can be handled through normal customer-service procedures, but anything that may indicate a safety risk should be escalated to the person responsible for food safety.
Record the facts at the first contact
Record what the customer reports accurately rather than diagnosing the cause. Useful details can include contact information, date and time of the visit or purchase, foods eaten, when symptoms or the problem were noticed, other people affected, product or batch information where relevant and any photographs or packaging available.
Keep the record factual. Staff should not make unsupported admissions about the cause of an illness or tell a customer that a particular food definitely caused food poisoning when that has not been established.
Protect food and evidence while you investigate
Consider whether related food needs to be isolated or removed from sale while the issue is assessed. SFBB guidance notes that it may be appropriate to remove food from the same batch and to inform the supplier if the problem may have originated there.
Preserve relevant traceability information, labels, delivery records, temperature records, recipes, allergen information and other evidence. Do not alter records retrospectively to make the situation look compliant.
Review what happened in the kitchen
Check the food-safety records and safe methods relevant to the complaint. Speak to staff involved and look for other similar complaints or unusual events. SFBB specifically suggests reviewing the diary and records, checking whether safe methods were followed and considering whether staff illness was reported.
When should the local authority or FSA be involved?
Members of the public can report suspected food poisoning and other food-safety concerns to the relevant local authority food-safety team. A business should cooperate with an official investigation and preserve the information requested.
Where a business has reason to believe food it supplied is unsafe or does not comply with food-safety requirements, incident, withdrawal and recall duties may apply. Current FSA guidance says businesses should tell the competent authority and take prompt action where unsafe food needs to be withdrawn or recalled. Serious incidents or unsafe food reaching consumers may also require FSA incident-team involvement. Follow current authority instructions for the circumstances rather than relying only on an internal complaints process.
Suspected food poisoning does not automatically identify the source
Symptoms can arise from different causes and may begin at different times after exposure. A customer report should therefore be taken seriously without assuming that the last meal they ate was necessarily the source.
The business role is to provide accurate information, protect any potentially affected food and cooperate with environmental health or public-health investigation where required, rather than attempting to provide a medical diagnosis.
Allergic reactions require particular care
If a complaint involves an allergic reaction, preserve the recipe, ingredient and supplier information that applied at the time, including any substitutions or menu changes. Check what allergen information was provided to the customer and how the order was communicated and prepared.
If there may be an ongoing risk to other customers, act immediately to control it. The TKEG allergen guide covers the wider allergen-information and cross-contact controls expected in food businesses.
Correct the cause, not just the complaint
If the investigation identifies a failure, take corrective action and review the relevant safe method. That might involve disposing of or isolating food, contacting a supplier, repairing equipment, changing a process, correcting allergen information, improving separation or retraining staff.
Record what changed. A complaint log is much stronger due-diligence evidence when it shows investigation and corrective action rather than simply recording that a customer contacted the business.
How TKEG can support complaint investigations
TKEG (The Kitchen Efficiency Group) brings operational evidence such as temperatures, deliveries, cleaning, opening and closing checks, allergens, traceability information, photographs and corrective actions together. That can make it faster to reconstruct what happened on a particular service date.
TKEG does not determine whether a customer has food poisoning and does not replace environmental-health, medical, legal or FSA advice. Where an incident may involve unsafe food, use the appropriate official reporting and incident procedures.
Practical guidance, checked against official UK sources.
TKEG guidance is written for practical hospitality use. Where a topic involves regulation, official schemes or workplace safety, businesses should also consult the current guidance from the relevant authority and apply it to their own operation.
TKEG is independent and is not affiliated with or endorsed by the Food Standards Agency, HSE or a local authority. Official guidance and legal requirements take precedence where applicable.
Put the guidance through a practical check
Use our free interactive tools to assess inspection readiness, generate a tailored checklist, check temperatures, review training needs, test allergen and COSHH controls, or review your HACCP-based food-safety management system.
Food Hygiene Rating Readiness Checker
Review 12 practical inspection-readiness checks across food handling, premises and management.
Use free tool →Commercial Kitchen Compliance Checklist Generator
Generate a practical checklist tailored to your hospitality business and operating processes.
Use free tool →Commercial Kitchen Temperature Safety Checker
Compare chilled, hot-holding, cooking and reheating readings with common UK reference points.
Use free tool →Food Hygiene Training Requirements Checker
Check the training, instruction and supervision appropriate to different hospitality roles.
Use free tool →Allergen Compliance Self-Check
Review allergen information, staff procedures, cross-contact controls and PPDS labelling.
Use free tool →COSHH Compliance Self-Check
Review hazardous substances, COSHH assessments, storage, dilution, PPE, training and emergency controls.
Use free tool →HACCP & Food Safety Management Self-Check
Review hazards, controls, monitoring, corrective actions, verification, records and staff understanding.
Use free tool →Explore the main UK kitchen compliance topics
Move between the core topic hubs to understand how food-safety records and controls connect.
Continue with closely related guidance
Food recall and withdrawal procedure
Read the TKEG guide.
Food traceability records
Read the TKEG guide.
Food allergen requirements
Read the TKEG guide.
Preventing cross-contamination
Read the TKEG guide.
Food safety due diligence checklist
Read the TKEG guide.
HACCP and food safety management
Read the TKEG guide.
Related TKEG software and workflows
TKEG helps hospitality teams record, manage and evidence many of the day-to-day controls covered in our guides.
Common questions
What should a restaurant do if a customer says they have food poisoning?
Take the report seriously, record the facts, preserve relevant records and food information, investigate the controls used during the relevant service and consider whether food needs to be isolated. Cooperate with the local authority if the complaint is reported or an investigation begins.
Does a customer complaint prove the restaurant caused food poisoning?
No. A report of illness should be investigated seriously, but it does not by itself establish the source or cause.
Should I throw away the food immediately?
Protect consumers first, but also consider the need to preserve useful evidence and traceability information. Depending on the circumstances, related stock may need to be isolated or removed from sale. Follow local-authority or FSA instructions where an official incident is involved.
Do I need to report every customer complaint to the FSA?
No. Ordinary complaints are not all FSA-reportable incidents. However, if there is reason to believe food supplied is unsafe or non-compliant, withdrawal, recall and notification duties may apply. Follow current official guidance and contact the competent authority when required.
What records help investigate a food complaint?
Relevant records may include deliveries and traceability, temperatures, cooking and cooling, cleaning, staff illness, allergens, recipes, date coding, corrective actions and details of other similar complaints.
Turn the paperwork into a working system.
TKEG brings food-safety records, compliance evidence and kitchen management together.