Reading a kosher certificate properly is a skill worth having in two directions: checking the certificates your suppliers send you, and understanding how buyers will read yours. Most certification problems that reach us start with a letter somebody filed without reading.
Here is how to read one in about ninety seconds.
The seven things to check, in order
- Is it in date? Look at the expiry before anything else. An expired certificate is not weak evidence — it is no evidence.
- Whose certificate is it? The company named must be the company you are buying from. A certificate for a parent company, a sister plant or a distributor does not cover the entity on your invoice.
- Which facility? Certification attaches to a plant. A company with three facilities may have one certified. Check the address against where your product is actually made.
- Is your product on it? By name, and ideally by the code you order. A general statement about the company’s products is not a product list.
- What is the designation? Pareve, dairy, dairy equipment, meat, fish. If you need pareve and the letter says DE, you do not have what you need.
- Are the additional standards stated? Cholov yisroel, pas yisroel, yoshon, kosher for Passover. If you need one and it is not written, assume it is not covered.
- Who issued it, and can you verify it? The agency should be identifiable and contactable, and should confirm the letter on request.
What should make you pause
None of the following is automatically disqualifying, but each is a reason to ask a question before you rely on the document:
- No product list — just the company name and a symbol.
- No expiry date, or a term stated so loosely you cannot tell when it ends.
- No designation. Every certified product has one. A letter that omits it is incomplete, not neutral.
- A facility address that does not match where you know the product is made — common with co-packed goods, and worth resolving rather than assuming.
- No verifiable issuer. If you cannot reach the agency to confirm the letter, your own certifier will have the same problem.
- A screenshot or a photograph of a label offered in place of a letter.
- A plain letter K as the only identification. It is not a registered mark and identifies nobody.
Checking your suppliers’ certificates
If you hold certification, your suppliers’ letters are part of your file, and the discipline around them is what keeps your own certification clean:
- Track expiry dates centrally, with a reminder ahead of each one. Supplier letters expire on their own schedule, not yours.
- Re-check the letter whenever a supplier changes a formulation, a plant or an owner.
- Check the designation, not just the presence of a symbol — a supplier switching a pareve ingredient to DE will change your product’s status without telling you.
- Keep the actual letter, not a note that one existed.
Your certifying agency does this work too, but a supplier lapse found during a renewal review is a scramble, and one found in advance is an email. Realistically, your purchasing team will notice before we do.
How buyers will read yours
Assume the person reading your certificate is doing so quickly, under a deadline, and looking for a reason to move on. That means:
- The product list should match the codes they order by, not your internal naming.
- The designation should be unambiguous. If a product is pareve, it should say pareve.
- The expiry should be comfortably in the future. A certificate expiring in three weeks invites a follow-up you would rather not have.
- Verification should be easy. If a buyer has to work to confirm the letter is real, that friction becomes your problem.
What we issue
Pure K letters list products individually with their designations and any additional standards, name the certified facility, carry a clear expiry, and are verifiable by contacting us directly. We reissue whenever your product list changes and keep the letter current at renewal, so the version in your customers’ files is the version we issued.
Get a free quote, or read more on what a letter of certification covers and how long it stays valid.