An import/export declaration is required when moving financial assets in amounts exceeding
a specific limit.
If you want to transfer a large sum of money between banks in EU you may be asked to provide certain details for statistical reasons. The same applies if you want to use intermediaries, other than a bank, as for instance the post offices financial services.
Useful references:
DGAIEC – Direcção-Geral das Alfândegas e Impostos Especiais sobre o Consumo Rua da Alfândega, 5, r/c 1149-006 Lisboa Tel: 218
813 700/ 218 813 818 Website