# Parcels

[Shipments](/core-api-reference/shipments.md) can be split into two or more parcels, that get tracked by the [shipping carrier](/core-api-reference/carrier_accounts.md). For cross-border shipments, you can fill in a customs form. The related documentation is automatically generated, updated, and attached to the parcel that will be delivered in a [package](/core-api-reference/packages.md) to the assigned customer's shipping address.

<details>

<summary>Data model</summary>

Check the related [ER diagram](/data-model/shipping/parcels-packages-and-pickups.md) and explore the flowchart that illustrates how the parcel resource relates to the other API entities.

</details>


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