How to Audit an Olive Oil Supplier Before Ordering

In brief. Auditing an olive oil supplier means verifying six points before paying: the ONH export approval and legal status, the COA per batch from an IOC-accredited laboratory, the capacity and traceability of production, a mill visit (physical or video), a sealed reference sample, and verifiable client references. Each point neutralises a risk. A serious supplier responds without reluctance; opacity on any of these six points is a warning signal.

Choosing a supplier is one thing; auditing them is another. The first is about selection, the second about operational verification on the importer's side: a checklist you run through before signing, document by document. Here is the audit grid to apply methodically.

Why audit before ordering?

Because an immobilised container, a downgraded batch or a non-payment cost far more than an hour of audit. The audit is not about trusting: it is about demanding proof. A reliable supplier provides it spontaneously; the one who dodges already tells you about the risk. Run through the six points below and rate each one.

Point 1 — ONH approval and legal status

This is the foundation. In Tunisia, exporting olive oil requires a registered company, a customs code and an export approval issued by the ONH (National Oil Office). Check:

• The legal existence of the company (trade register, tax number).
• The ONH export approval — or, failing that, a commission contract with an approved partner.
• The ability to issue export documents (invoice, EUR.1, phytosanitary).

An unapproved intermediary is not a dealbreaker if they rely on an approved exporter, but they must say so clearly and name the partner.

Point 2 — COA per batch from an IOC-accredited laboratory

The COA (certificate of analysis) only has value if it covers your batch and comes from an IOC-accredited laboratory. Require it and check that it covers the thresholds of an extra virgin:

Parameter	Extra virgin threshold	What it reveals
Free acidity	≤ 0.80%	Fruit degradation
Peroxide value	≤ 20 mEq O₂/kg	Oxidation / freshness
K232	≤ 2.50	Primary oxidation
K270	≤ 0.22	Oxidation / trace of refined
ΔK	≤ 0.01	Anomaly / refining
Polyphenols	≥ 250 mg/kg (EFSA claim)	Health and preservation

Beware of a "generic" COA that is undated or without a batch number: it proves nothing about the goods you will receive.

Point 3 — Capacity and traceability

A supplier must be able to honour the volume promised and trace the origin of each batch. To question:

• Production/storage capacity: volumes available per campaign, matching your need.
• Upstream traceability: link between the olive groves/varieties (Chemlali, Chetoui…) and the batches.
• Batch management: numbering, milling dates, storage conditions (stainless steel tanks, nitrogen, temperature).
• Packaging: mastery of bulk formats (flexitank ~22,000 L, IBC 1000 L, drums 200 L).

A supplier who does not know where their oil comes from will be able neither to guarantee consistency nor to arbitrate a dispute.

Point 4 — Mill visit (physical or video)

Seeing the production tool is worth a thousand declarations. If a trip to Sfax or Béja is not possible, ask for a live video visit:

• Condition of the mill and the storage tanks.
• Extraction line (cold), cleanliness, flow management.
• Packaging and container loading area.

A transparent supplier organises this visit without difficulty. A categorical refusal, without reason, is a signal to take seriously.

Point 5 — Sealed reference sample

The sensory audit is done on a sample representative of the batch you will buy, not on a "showcase" batch. Taste it, have it analysed if the volume warrants it, then keep a sealed part:

• Check the category (extra virgin) and freshness.
• Note the profile: fruitiness, pungency, bitterness according to the variety.
• Keep the sealed sample as a reference in the event of a dispute on arrival.

This step is detailed in our dedicated article: the olive oil sample before ordering.

Point 6 — References and reputation

Finally, cross-check the external evidence:

• Client references: ask for current buyers (markets, volumes) and, if possible, contact some.
• Certifications: organic (Ecocert), IFS/BRC for retail, halal/kosher/FDA according to the target market.
• Distinctions: recognised competitions, export history.
• Seniority and regularity: an exporter who has delivered over several campaigns reassures more than a player without a track record.

Summary: the audit grid in 6 lines

#	Point to audit	Proof to obtain
1	Approval & status	ONH approval / commission contract
2	Quality	COA per batch, IOC-accredited lab
3	Capacity & traceability	Volumes, batch numbering, storage
4	Production tool	Physical or video mill visit
5	Sensory	Representative sealed sample
6	Reputation	Client references, certifications, history

To cost your need and compare offers at the same incoterm, rely on our tools. And for the whole import approach, see how to secure your first olive oil import.

FAQ

What is the ONH approval and why check it?

The ONH (National Oil Office) export approval authorises a Tunisian company to export olive oil. Checking it guarantees that your supplier can legally ship and issue the export documents. An unapproved intermediary must rely on an approved partner and name them clearly.

Is a COA enough to validate a supplier?

No. The COA validates the chemical quality of a batch, but the audit also covers approval, capacity, traceability, the production tool and references. A good COA on a supplier unable to honour the volume or trace their batches is not enough to secure the order.

Do you absolutely have to visit the mill?

Ideally yes, but a live video visit is an acceptable substitute if the trip is not possible. The aim is to see the production tool, the storage tanks and the loading area. A refusal to visit without valid reason is a warning signal.

How do you verify production capacity?

Ask for the volumes available per campaign, the storage capacity, batch numbering and preservation conditions (stainless steel tanks, nitrogen, temperature). Cross-check this information with the mill visit and the export history. The supplier must be able to honour your volume without improvisation.

What is the sealed sample for in the audit?

It validates the sensory profile of the batch you will buy and serves as a preserved reference. In the event of a dispute on arrival, you compare the goods received with this sealed sample and the batch COA. Without a preserved reference, a quality disagreement becomes difficult to arbitrate.

What is the reference price to know before auditing?

Tunisia starts around ~3.80 €/kg FOB at origin, excluding freight, insurance and duties. Knowing this benchmark prevents you from being seduced by a "too good" price that often hides a defect in quality or documentary compliance.

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Ready to audit a Tunisian supplier? Request a quote: we reply within 24-48h with approval, COA per batch and references in hand. Use our tools to cost your landed cost and compare offers on a common basis.