In this guide 6 sections
An auditor expects temperature logs per chamber, calibration certificates for the probes, sanitation and pest control records, receiving checks, and lot traceability from supplier to customer. Each must be dated, signed and retrievable within minutes. Software helps by tagging every record to a chamber, lot or date.
Temperature records come first
Auditors start in the chamber and ask for the log. They want readings for the period, the set point and the limits for that room. Frozen store, chiller and dock each carry different limits. One shared sheet is a red flag.
Gaps matter as much as readings. A missing night shift or a weekend with no entries invites questions. Data loggers that upload on their own remove most gaps. Someone must still answer the alarms.
Every excursion needs a story: the time, the duration, the stock affected and the action taken. Keep that story next to the log, not in a separate email.
- Logger or manual readings per chamber and shift
- Alarm limits and who was called
- Excursion report with stock affected
- Door-open and defrost cycle notes
- Product decision after the excursion
Calibration proves the numbers can be trusted
A log means little if the probe behind it drifted. Drift is silent. Auditors ask for the calibration certificate of every thermometer and logger, the reference used and the date of the next check.
Link each probe to its chamber in a register. When a probe fails its check, you must know which readings came from it and which lots sat in that room. Without the link, you recall too much stock or too little.
Keep spare probes tagged, calibrated and ready on a hook near the door.
Sanitation and pest control need a paper trail
Cleaning schedules, sanitiser concentrations, swab results and pest control visit reports all count. The auditor will pick one date and ask who cleaned which area, with what, and who checked it afterwards.
Corrective action forms matter here. If an ATP swab failed, show the re-clean, the retest and the sign-off. A closed loop looks professional. An open one looks like neglect.
Store these by area and by date so one search brings up the full week for the dock, the chambers and the loading bays.
- Cleaning checklist by area and shift
- Sanitiser strength and contact time
- Swab or ATP test results
- Pest control visit report and bait map
- Corrective action and retest sign-off
Receiving and traceability link everything
At the dock, record the vehicle temperature, the product core temperature, seal numbers, the condition of packing and the supplier’s lot code. Reject or quarantine forms should show who decided and why.
Traceability means one step back and one step forward. For any lot, you must name the supplier and the customers who received it. Auditors often run a mock recall, so be ready to produce the answer in minutes.
This is where lot-level data in software pays off. Searching a paper folder for a lot code across ten chambers is slow. Pressure makes it slower still.
Make every record retrievable before the audit
Run your own mock audit each quarter. Pick a lot from the freezer. Trace it forward. Pull the temperature logs for its whole stay. Stopwatch the whole exercise.
Fix what you find. Missing signatures, unlabelled files and records held by a single person all show up. Give each record type an owner. Set a review date.
Then write a short index that lists where each record lives, so a new auditor, or a new colleague, can find it unaided.
- Index of records by type and owner
- Retention period for each record
- Mock recall result and time taken
- List of open corrective actions
Cold chain audit readiness sheet
A single sheet that lists each record type down the left side: temperature log, probe calibration, cleaning, pest control, receiving check, lot trace and corrective action. Columns show the owner, the storage place, the search key (chamber, lot or date), the last review date and a pass or gap mark. A footer box holds the mock recall time.
Open a blank worksheet to printQuestions owners ask
How long should cold chain records be kept?
It depends on your regulator, your customers and the product shelf life. Ask your certifying body and your larger customers, then keep the longest period they name. Software can enforce the rule per record type.
Are automatic data loggers better than manual readings?
They fill gaps and time-stamp reliably, which auditors like. Manual readings still have a place as a cross-check and for areas without loggers, provided they are signed and reviewed.
What does an auditor check in a mock recall?
They choose a lot and ask where it came from, where it went and how much remains. Good records answer all three quickly, with the temperature history attached.
Can paper records pass an audit?
Yes, if they are complete, legible, signed and quickly found. The risk is retrieval time and gaps, which is why many firms move chamber and lot records into software.