The age old story: you’ve been handed an old label with a UL logo on it and been asked to get more. There are no records, and the person who bought them last time is long gone. Where do you start? Well thankfully one of the key pieces of information needed to print the labels can be identified rather quickly.

That information is the Follow-Up Service Type. Yes, the name is horribly unhelpful (it’s UL–what did you expect?), but it matters. Why? Each of the two types has different approval rules associated with it. In order to process your labels correctly, whoever you choose to print your labels will need to know whether the label is Type R or Type L. Here’s what to look for:

Type R labels normally consist of the following elements:
– Appropriate UL symbol as defined in your UL Procedure book
– Product name
– A four-character alphanumeric Control Number (this is a fixed number that is associated with a specific UL file number)

Type L labels normally consists of the following elements:
– Appropriate UL symbol as defined in your UL book
– Product name
– UL Listee Company name or UL File Number
– The words “ISSUE NO.”, “SERIAL NO.” or “PRODUCT NO.” followed by the numbers appearing on the authorization order from UL

What to know what to do next? Visit our guide or reach out to our [email protected].