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

# Account Number

An Account Number is the string of digits that senders use to pay you. In Mexico, an Account Number is a standardized Mexican bank account number (CLABE). In Chile, an Account Number is a traditional bank account number. An Account Number points to an `Account`. This page explains the relationship between Account Numbers and `Account` objects. You also learn how to configure Account Numbers and which rules apply to Account Numbers. For the API fields, see the [Account Number object](/api/transfers-api/account-numbers/account-number-object) reference.

In Fintoc, Account Numbers and `Account` objects are decoupled. Each `Account` can have more than one Account Number. Each `Account` holds a balance. Account Numbers route incoming money.

## What you can do with Account Numbers

You can use Account Numbers to:

* **Reconcile payments.** Attach `metadata`, such as `customer_id` and `invoice_id`, to an Account Number. When a transfer arrives, the webhook carries that metadata back to you.
* **Filter incoming transfers.** Set `options.min_amount` and `options.max_amount` to automatically reject payments above or below those limits. See [Add logic to Account Numbers](/guides/transfers/inbound-transfers/add-logic-to-clabes).
* **Retire Account Numbers.** Disable or delete Account Numbers you no longer need. See [Manage your Account Numbers](/guides/transfers/inbound-transfers/manage-your-clabes).

## Root Account Number

Fintoc creates every `Account` with one default Account Number, marked as `is_root: true`. Your outbound transfers always originate from this root Account Number.

## Rules

Account Numbers follow these rules:

* **You cannot reassign an Account Number.** You cannot move an Account Number from its original `Account` to a different `Account`.
* **Disabled Account Numbers reject transfers automatically.** The money returns to the sender. See [Add logic to Account Numbers](/guides/transfers/inbound-transfers/add-logic-to-clabes).
* **Deleting an Account Number releases it.** Fintoc can reassign the Account Number to another Fintoc customer. See [Manage your Account Numbers](/guides/transfers/inbound-transfers/manage-your-clabes).

## Account Number quota

By default, you can create up to 1,000,000 Account Numbers per organization.

Deleting an Account Number frees up quota. Deletion cannot be undone.

If you need to create more than 1,000,000 Account Numbers, contact your sales representative.