Codes & Classifications
Unique Entity Identifier (UEI)
A 12-character alphanumeric identifier assigned to entities registering in SAM.gov, replacing the DUNS number.
In context
How Unique Entity Identifier works in supplier diversity
The UEI is now the primary identifier for federal contractor registration. It is generated automatically when a business registers or renews in SAM.gov. Unlike DUNS, which was issued by a private company, UEI is assigned directly by the government at no cost.
Example
Real-world example
The certification quiz checks your business against every certification we track. The result is a ranked list with the buyers each one opens. Or open the certification reference for the full guides.