# Invoice Custom Field

An additional seller-defined and customer-facing field to include on the invoice. For more information,
see [Custom fields](https://developer.squareup.com/docs/invoices-api/overview#custom-fields).

Adding custom fields to an invoice requires an
[Invoices Plus subscription](https://developer.squareup.com/docs/invoices-api/overview#invoices-plus-subscription).

## Structure

`InvoiceCustomField`

## Fields

| Name | Type | Tags | Description | Getter | Setter |
|  --- | --- | --- | --- | --- | --- |
| `label` | `?string` | Optional | The label or title of the custom field. This field is required for a custom field.<br>**Constraints**: *Maximum Length*: `30` | getLabel(): ?string | setLabel(?string label): void |
| `value` | `?string` | Optional | The text of the custom field. If omitted, only the label is rendered.<br>**Constraints**: *Maximum Length*: `2000` | getValue(): ?string | setValue(?string value): void |
| `placement` | [`?string (InvoiceCustomFieldPlacement)`](../../doc/models/invoice-custom-field-placement.md) | Optional | Indicates where to render a custom field on the Square-hosted invoice page and in emailed or PDF<br>copies of the invoice. | getPlacement(): ?string | setPlacement(?string placement): void |

## Example (as JSON)

```json
{
  "label": null,
  "value": null,
  "placement": null
}
```