Upvote:5
Specifically for Warsaw (Chopin airport) here's the full information on getting the VAT refund: https://www.lotnisko-chopina.pl/en/tax-refund.html
The location is:
Customs office is located in landside between B and C check-in zones and in passenger zone after passport control.
which I understand are effectively two options:
Upvote:15
Immigration and customs are two different things in Europe. The exit stamp you will get in your passport has nothing in common with the export stamp you need for your invoices. For the purpose of getting your VAT back what needs to be certified is that the goods in question have left the EU, not necessarily you...
You will pass through exit passport control in Warsaw, as that is where you leave the Schengen area.
To get you invoices stamped you will need to go to a customs office. If the merchandise is in your checked luggage you will need to do this in Gdansk, as they often want to see it. Even for stuff in your hand luggage doing it in Gdansk is probably better as the customs offices are usually land side.