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

# How-to: Use Forwarding Service

> Use Forwarding Service on bridge transfers

You can use the
[Forwarding Service](https://developers.circle.com/cctp/concepts/forwarding-service)
on bridge transfers. When enabled, it fetches the attestation and submits the
mint on the destination chain. You don't need to poll for attestations or have
access to a wallet on the destination chain.

## Prerequisites

Before you begin, ensure that you've:

* [Installed the App Kit SDK](/app-kit/tutorials/installation)
* [Configured an adapter](/app-kit/tutorials/adapter-setups)

These are required so any example below runs with a valid `kit` and `adapter`.

## Use with adapters on both chains

Set `useForwarder: true` when you have adapters for both chains but want the
Forwarding Service to submit the mint transaction on the destination:

```typescript TypeScript theme={null}
const result = await kit.bridge({
  from: { adapter, chain: "Ethereum_Sepolia" },
  to: {
    adapter,
    chain: "Arc_Testnet",
    useForwarder: true,
  },
  amount: "1.00",
});
```

## Use without a destination adapter

When you don't have access to a wallet on the destination chain, such as with
server-side or custodial bridge flows, omit the destination adapter and pass
`recipientAddress` with `useForwarder: true`:

```typescript TypeScript theme={null}
const result = await kit.bridge({
  from: { adapter, chain: "Ethereum_Sepolia" },
  to: {
    recipientAddress: "0xRecipientAddress",
    chain: "Arc_Testnet",
    useForwarder: true,
  },
  amount: "1.00",
});
```

In this mode, mint confirmation comes from the Circle Iris API response rather
than an onchain receipt. Because the Forwarding Service submits the mint
transaction, no locally signed transaction hash is returned and the mint step's
`data` field is `undefined`.

## Forwarding fee

The Forwarding Service charges a
[fee](https://developers.circle.com/cctp/concepts/forwarding-service#fees-and-execution)
that is deducted from the amount minted on the destination chain. When you
[estimate costs](/app-kit/tutorials/bridge/estimate-costs) for a bridge
transfer, the result includes the forwarding fee. See
[How bridge fees work](/app-kit/concepts/bridge-fees) for details.