[dwild]

Sure, having a UL tags doesn't guarantee that it has been UL certified, but missing one guarantee that it hasn't been UL certified.

[officeplant]

Plus its free to make an account and search the UL database[1]. I work in the fire industry and I have to prove to customers all the time that the UL stamp on devices and datasheets is actually backed up with proper documentation.

[1] https://iq.ulprospector.com/en/

[masonic]

But if it's a counterfeit product masquerading as a brand name, the fact that the genuine brand-name product is listed offers only false assurance to the buyer of the counterfeit.

[rhizome]

There's no defense against someone lying to you about something you don't know, and what you describe is part of the definition of "counterfeit."