Can I use the word "certified" in my marketing and materials?

Question Details: I have a car/auto detailing business and wish to use the word "'certified" in my marketing and materials. So I may print in ads, "Your car will be certified automagic clean using our 12 point checklist" or "Your car is automagic certified clean". Is the word certified a word I am legally allowed to use without a course behind it?

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