Item Unique Identifier 

Type - Data Synonym
Description: The set of data used to uniquely identify a tangible asset used to ensure accurate acquisition, repair, and deployment of items is efficient and effective. The concatenated IUID Data Set can be created using UII Constructs #1, UII Constructs #2, or a DoD recognized IUID equivalent which consist of the following: Global Individual Asset Identifier (GIAI), Global Returnable Asset Identifier (GRAI), Vehicle Identification Number (VIN), or Electronic Serial Number ((ESN), for cell phones only). 
Information Exchange: Acceptance Evidence