# Sell to businesses (B2B)

Let a customer switch to an organization flow inside the same Kustom Checkout — organization number instead of a personal identity, separate billing and shipping addresses, and invoice and card payment, on the same API as the consumer flow.

B2B lets a customer switch to an organization flow inside the same checkout: organization
number instead of a personal identity, separately configurable billing and shipping
addresses, invoice and card payment, and recurring orders. It runs on the same API as the
consumer flow, so an existing integration only adds the fields below.

Card payment for business customers is available in every market where Kustom Checkout is
activated. Invoice payment through [Billie](/checkout/billie/) is limited to Billie's own markets.

## Offer both flows

List both customer types, and the customer chooses:

```json
{
  "options": {
    "allowed_customer_types": ["person", "organization"]
  }
}
```

## Start in the B2B flow

Set the customer type directly, and optionally pre-fill the organization number:

```json
{
  "customer": {
    "type": "organization",
    "organization_registration_id": "556036-0793"
  }
}
```

## Read the result

`customer.type` on the completed order tells you which flow was used, and
`billing_address` may then carry organization fields such as `organization_name` and
`attention` — the reference the customer entered.

If you need to know **before** the order is placed — to price differently, or to show a
different confirmation — the client-side `customer` event reports the type, on load and again
whenever the customer switches flow. (`load` carries it too, alongside an address narrowed to
country and postal code.) Neither event carries the organization fields: `organization_name`
and `attention` are on the order, not in an event payload.

## Related

- [Checkout options](/checkout/checkout-options/) — the `options` block these fields sit in
- [Checkout JavaScript events](/checkout/client-side-events/) — the `customer` event and the rest of the catalogue
- [Create and update an order](/checkout/integrate/create-order/) — the call these fields belong to