. • https://www2.gov.pt/en/servicos/pedir-o-numero-de-identificacao-fiscal-para-pessoa-singular • https://taxdo.com/resources/global-tax-id-validation-guide/portugal • https://www.oecd.org/content/dam/oecd/en/topics/policy-issue-focus/aeoi/portugal-tin.pdf Romania Personnummer; rumensk: Codul numeric personal (CNP) Sifre: 13-sifret Format: 9999999999999 CNP (13 siffer) som finnes på identitetskort, pass eller oppholdstillatelse.