. • 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 Personal Code; Romanian: Codul numeric personal (CNP) Digits: 13-digit Format: 9999999999999 CNP (13 digits) found on identity card, passport or residence permit.