> ## Documentation Index
> Fetch the complete documentation index at: https://dev.smile.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Customer Identity object

> Reference for the customer identity object in the Smile REST API.

Customer identities represent individuals or entities in an external system and how they map to customers in a Smile loyalty program. They contain basic details like email and name, along with the external system's unique identifier for the individual. In practice, a single customer in Smile may have zero, one, or many different customer identities.