What Is a Food Complaint Handling Procedure?
A food complaint handling procedure is the documented process for recording customer and consumer complaints, investigating their root cause, responding to the complainant and closing each one with corrective action. Reviewing complaints together over time means recurring issues are spotted and fixed, rather than handled one at a time.
There is no specific UK or US regulation that prescribes a complaint procedure. Complaints feed into wider legal duties, such as the UK duty to withdraw unsafe food under retained Regulation (EC) 178/2002 Article 19, and US CGMP and preventive controls records. Complaint handling is a requirement of certification standards. IFS Food Version 8 clause 5.8 says "All complaints shall be recorded, be readily available and assessed by competent staff. Where it is justified, actions shall be taken immediately", and complaints "shall be analyzed with a view to implementing actions to avoid the recurrence". BRCGS Food Safety Issue 9 clause 3.10.1 requires that "All complaints shall be recorded and investigated", with actions "carried out promptly and effectively by appropriately trained staff", and clause 3.10.2 requires root cause analysis "where there has been a significant increase in a complaint, or a serious complaint".
Step by Step: Log, Investigate, Respond, Close
- Log. Record the complaint straight away: date, complainant, product, batch and date code, the nature of the complaint and any sample or photo.
- Classify. Categorize it (for example foreign body, allergen, quality, labeling, illness) and assess severity. Escalate anything that could indicate unsafe food immediately, as it may lead to a withdrawal or product recall.
- Investigate. Check production, cleaning and quality records for the batch, examine any returned sample and involve suppliers where a raw material may be the cause.
- Respond. Reply to the complainant with the outcome, in plain language and in a reasonable time.
- Correct. Raise corrective action where a cause is found.
- Close. Verify the action worked, record the outcome and sign off.

Root Cause and Corrective Action (CAPA)
A complaint is only truly closed when the cause is fixed. For each justified complaint:
- Identify the root cause, not just the immediate symptom
- Agree a corrective action, an owner and a due date
- Add preventive action where the same cause could affect other products or lines
- Verify effectiveness, then close
Treat significant complaints as nonconformances so they follow the same CAPA discipline as audit findings.
Reviewing Complaints for Recurring Issues
Looking at complaints one by one hides patterns. Review your log regularly, grouped by product, category, line and supplier, so a recurring issue triggers corrective action before it grows. Share the findings at management review. An open reporting culture helps too; see our food safety culture survey questions.
Example Complaint Responses
Foreign body, under investigation:
"Thank you for letting us know, and we are sorry for your experience. We take this very seriously and have started an investigation into the batch. If you still have the product and packaging, we would be grateful if you could keep them. We will contact you with our findings."
Quality issue, resolved:
"Thank you for your patience while we investigated. We found that [cause] and have [action taken] to prevent it happening again. We are sorry for the disappointment and appreciate you taking the time to tell us."
Escalate any complaint involving illness, injury or a possible allergen straight to your technical team.

