It is difficult to find out whether a car or bike is coated with Teflon or ceramic or wax or just polished by looking at it once. Usually, the difference lies in smoothness, which can be gauged on closer inspection. If you want to verify if the service provider has provided TC and not just any other coating, then you will have to seek expert opinion from a mechanic or quiz the service provider more about it. You can be proactive and check how the service provider performs the TC by visiting the workshop.