Is a Kosher Private Chef Just a Private Chef Who Uses Kosher Ingredients?
No. Kosher ingredients are one part of a larger set of requirements that also covers equipment, separation, kitchen status and, in some cases, supervision. A chef unfamiliar with those requirements can buy certified products and still produce a meal that a family cannot eat.
This is the single most common misunderstanding among travelers booking through general marketplaces. The listing says the chef can cook kosher; what is meant is that the chef can avoid certain ingredients. For a family that keeps a kosher home, that gap matters.