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

# Core Concepts

> Understand the key entities managed by CRM: Holders and Alias Accounts

The CRM core concepts define the entities that connect real-world identities to your Midaz ledger accounts. They provide the business context that the ledger's transactional layer doesn't manage.

## Content

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Here, you'll find:

* [**Holders**](/en/midaz/crm/holders): The core entity representing an individual (`NATURAL_PERSON`) or organization (`LEGAL_PERSON`) behind a ledger account. Holders store identity-related attributes such as name, document number, contact details, and addresses.
* [**Alias Accounts**](/en/midaz/crm/alias-accounts): The link between a Holder and a specific ledger account. Aliases allow a single holder to own multiple accounts across different ledgers while keeping banking details and metadata centralized.