What documents are required to open an Account for a minor (under 18 years old)? For the parents/legal guardians: Valid Identification Documents (one of the following documents): Portuguese Citizen Card; Authorization of Residency in Portugal; Passport/National Identity Card (only accepted if you have nationality in the European Union, Schengen Zone or United Kingdom). Valid Tax Identification Number (one of the following documents): Portuguese Citizen Card/Residence Permit/Taxpayer Card/Taxpayer Central Registration. Proof of address, with a validity of 12 months (one of the following documents): National Address: Water/electricity/telecommunication/insurance bill, Bank statement, Finance Documents; International Fiscal Address: Taxes liquidation issued by the fiscal authority of the country of residency or Document issued by the consulate. Proof of employment situation, with a validity of 6 months (one of the following documents): Employee: Pay slip or Work contract; Independent worker: "Green receipts", start/alteration of activity, Commercial Registry certificate or Company Registration; Student: Student ID, Enrolment proof or payment of tuition fees; Unemployed: Unemployment statement (Employment Center enrolment); Retired/Pensioner: Remuneration receipt or bank statement; Other situations: IRS Template 3 or bank statement. For the minor: Identification Document, Tax Identification Number and Proof of address (that can be from one of the parents/legal representatives).