About UL frequently asked questions
Have a specific question about UL? To find the answer, select a category to the left.
If you need immediate assistance, please contact a member of UL's customer service team by accessing the Customer Service page. Customer service advisors are located at each one of UL's laboratory facilities in the United States. They answer questions, provide information and assist customers as they work with UL on testing and certification projects. Although they are based in the United States, our advisors assist customers in all regions of the world.