A kosher certificate (your letter of certification) is typically valid for a set term — usually one year — and tied to ongoing supervision, not a one-time approval.
Why it expires — Certification is a living relationship: ingredients, suppliers, and processes change, so periodic review and renewal keep the mark trustworthy.
What buyers look for — Your customers check the expiration date, so keeping your certificate current matters for B2B sales.
We manage renewals and keep your letter current. Get a free, no-obligation quote → · How We Certify