UEI

Unique Entity ID

Your business's identity across federal systems. SAM.gov issues it, free, during entity registration, and it replaced the privately issued DUNS number in 2022. Award records, registrations, and payment systems all key off it.

In a sentence

"Include your UEI on the cover page." It is on your SAM.gov entity record; anyone selling you a UEI is selling you a free thing.

You’ll see it written as

unique entity identifier

SAM UEI

Full explainer: Register on SAM.gov

Terms like this show up in every federal notice. We translate them in place, on every notice in your trade.