# Beer swaps

If you're swapping beers with another brewery and no money is changing hands — i.e. the beers are being exchanged like for like — this can be handled in Breww as follows:

1. **Raise a zero-value invoice** for the beers you're sending to the other brewery. This will correctly reduce your stock levels and the appropriate duty will be incurred when dispatched.
2. **Add the beers you're receiving** as a *guest beer stock item*, and create a *guest beer product* so you can sell it. This will allow you to sell the beer at the price defined on the guest beer product.
3. As this is a guest beer product, it will not incur duty.

For more guidance on guest beers, see the *Guest Beers* section of the [**Alias, Derived & Guest Beers**](https://breww.com/docs/alias-derived-and-guest-beers) help article.

This allows you to dispatch stock to the other brewery and receive the stock they've provided in return, which you can then sell on to your own customers.