Scrapping UK car.

Check section "Se o veículo passar a estar registado no estrangeiro":

https://www2.gov.pt/pt/servicos/cancelar-uma-matricula

If the car is still on its original non-EU plates and was never matriculated (registered) in Portugal:

1. Documentation: You will need the original registration documents from the country of origin

2. Customs Status: Since the car is from a non-EU country, it technically entered Portugal under a "temporary admission" or is in the process of being imported. You usually need to prove the car's legal status to the facility. So you should go to a Customs Office (Alfândega) with jurisdiction over ISV (Vehicle Registration Tax) matters. These Customs Offices are organized by area of residence. They will verify if there are any outstanding taxes, how the vehicle was imported, and its overall legal status.

https://info-aduaneiro.portaldasfinanca … degas.aspx

3. The Certificate of Destruction: You must deliver it to an Authorized Treatment Facility (known in Portugal as a Centro de Abate or part of the VALORCAR network).The VALORCAR center will issue a Certificado de Destruição (Certificate of Destruction).

https://www.valorcar.pt/pt/vfv/proprietarios

4. Notifying Your Home Country: The Portuguese authorities (IMT) will not automatically tell your home country that the car is gone. You must send the Certificate of Destruction to the transport authority in the non-EU country to ensure you stop paying taxes or insurance there.

Summary Checklist

1. Go to a Customs Office (Alfândega)
2. Locate a Center: Find a licensed VALORCAR center.
3. Required Documents: Original foreign logbook/title, NIF (Portuguese Tax Number), and ID.
4. The Certificate: Keep the Certificado de Destruição forever.
5. Deregister Abroad: Send proof to your non-EU transport authority.

Hi,
We're thinking of driving over in an oldish car which will be filled with used tools, kitchen stuff etc. but obviously it can only be in the EU for 6 months. - @Strontium

I personally know several cars from foreign countries which are being used in Portugal for many years without being registered here. I assume that tax and insurance is paid for them in the "home" country. While I am sure that this is completely illegal, it doesn't seem to be fined very heavily or be followed up very rigorously.

it doesn't seem to be fined very heavily

Fines ranging from €250 to €165,000.

https://impostosobreveiculos.info/isv/c … -portugal/

___

Law

https://www.pgdlisboa.pt/leis/lei_mostr … ;so_miolo=

Artigo 109.º

Introdução irregular no consumo

2 - São puníveis com coima de (euro) 250 a (euro) 165 000 os seguintes factos:

...

3 - A coima prevista no número anterior é igualmente aplicável a quem:

a) Introduzir no consumo, expedir, exportar, utilizar ou mantiver a posse de veículos tributáveis sem o cumprimento das obrigações prescritas por lei;

....

Hi,
We're thinking of driving over in an oldish car which will be filled with used tools, kitchen stuff etc. but obviously it can only be in the EU for 6 months. Rather than drive it back we'd use it as a "builders van" then scrap it. We have seen a scrap car place about 12Km away.
Can anyone explain how the scrapping of non EU cars in Portugal works? - @Strontium

You could also get in contact with the fire brigade; they are always after scrap cars for training purposes and if you are lucky, they will do any of the necessary paperwork for you. I have known a couple of people who have done that in Austria. But our fire brigade are volunteer's.

@TGCampo

They are very lucky that they haven't been caught. It only takes someone to report them, and then the law will be straight around, the longer they have not done the paperwork, the bigger the fines.