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I mean, not for a lot of food production. We had Halal cert at our grain mill and a few other places I’ve worked at, and we never treated the food differently. Same with Kosher. They just send someone out to extort your business for certificate renewal.
You’re supposed to. If they don’t they are lying to their customers. They don’t want it to touch the grills that were used for pork etc.
Grain mills don’t usually have things touching pork though