# The Customer object

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | string | yes |  |
| `number` | string | no |  |
| `first_name` | string | yes |  |
| `last_name` | string | yes |  |
| `email` | string | yes |  |
| `phone` | string | no |  |
| `organization_name` | string | no |  |
| `address` | string | no |  |
| `postal_code` | string | no |  |
| `city` | string | no |  |
| `country` | string | no |  |
| `vat_number` | string | no |  |
| `locale` | string | no | One of: `nl`, `en`, `fr`, `de`, `es`. |
| `mollie_customer_id` | string | no |  |
| `created_at` | string | yes |  |

```json
{
    "id": "abc123def456",
    "number": "CUST-001",
    "first_name": "John",
    "last_name": "Doe",
    "email": "john@example.com",
    "phone": "+31612345678",
    "organization_name": "Acme B.V.",
    "address": "Keizersgracht 1",
    "postal_code": "1015AA",
    "city": "Amsterdam",
    "country": "NL",
    "vat_number": "NL123456789B01",
    "locale": "nl",
    "mollie_customer_id": "cst_abc123",
    "created_at": "2025-01-15 10:30:00"
}
```