Different shop address on packing slip depending on customer address?

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We are based in the UK, and ship UK, EU and ROW orders from here.

We also have a mailing house in the US for US orders specifically.

On the packing slip, we have a "return address" section in case orders are undeliverable. Is it possible to show the UK address by default, but the US mailing house address if the customer's address is in the US, as that's where any undeliverable US orders would need to be returned?