UL provides certification and follow-up services to manufacturers that can be identified by consumers through the use of the UL Mark on the product. Because the UL Mark is so important, manufacturers must submit a design layout of the UL Mark to a UL label center for review to verify that all required information is in an acceptable format. This must be done prior to reproduction of the UL Mark and prior to application of the Mark to eligible products. This advance review eliminates potential disruption in production due to an unacceptable UL Mark design. For more information on reproducing the UL Marks, refer to our document on printing UL Marks. UL maintains a database of authorized label suppliers. These suppliers have signed an agreement with UL and are authorized by UL to print labels with the UL Mark. Only the suppliers shown in this database are authorized to print labels with the UL Mark. If your supplier is not included in this database and is interested in participating in the program, the supplier can submit a request to UL’s customer service department. If you are a manufacturer of a UL certified product and need assistance finding a UL authorized label supplier, contact a UL Label Center.The inclusion of a label supplier’s name in this database does not indicate compliance with UL’s Recognized Component program for marking and labeling systems.To determine if a supplier has coverage in both UL’s authorized label suppliers program and UL’s restricted substance compliance solutions (RoHS) program, you need to do a search on both sites.
Complete UL Mark

The complete UL Mark identifies a product as being certified by UL. The complete Mark includes the UL symbol, the word “LISTED” or “CLASSIFIED” as appropriate, a control number, and a product identification. The complete Mark appearing on the product, or when not on the product on the smallest packaging means, must be printed by an authorized label supplier. Alternatively the Mark may also be printed at the OEM location when authorized by UL.


For Type R Marks, the complete UL Mark may at the manufacturer’s option, be repeated on packaging. It would only be necessary for the complete Mark on the product, or the when not on the product then the smallest packaging means to come from an authorized label supplier or printed at the OEM factory location.

For Type L products, allowable supplemental advertising on packaging using reference to UL can be found at Marks Hub. When the complete UL Mark cannot be applied to the product, then it will be required on the smallest packaging means.

Recognized component marking and labeling systems

UL iQ for Labels