Citizenship Services

One can become a U.S. Citizen through a variety of means—birth in the United States, birth abroad to a U.S. citizen parent, or through the naturalization process.  For all of these, a specific series of legal requirements must be met. At the U.S. Embassy in Lisbon, Portugal we can provide certification of U.S. citizenship for eligible individuals born abroad to U.S. citizen parents.  Our US Embassy in Lisbon, Portugal also processes Certificates of Loss of Nationality for those U.S. citizens who would like to give up their U.S. citizenship or believe that they have expatriated themselves.

For more information, please click on the appropriate service below:

As a U.S. citizen parent(s), you should report your child’s birth abroad as soon as possible to the U.S. Embassy or a U.S. Lisbon Portugal to establish an official record of the child’s claim to or acquisition of U.S. citizenship at birth. The official record will be the Consular Report of Birth Abroad (CRBA), Form FS-240. This form is evidence of U.S. citizenship, issued to a child born abroad to a U.S. citizen parent or parents who meet the requirements for transmitting citizenship under the Immigration and Nationality Act (INA).  CRBA applications must be made before the child’s 18th birthday.

Applying for a Consular Report of Birth Abroad

Applying for a CRBA is a simple process, but does require you to collect and submit some documentation.  We offer this service by appointment only in Lisbon, Portugal. Generally speaking, both parents should appear along with their child, to apply.  For your convenience, if both parents appear, you may also apply for your child’s first passport and social security number when you report your child’s birth.

To Apply for Your Child’s Consular Report of Birth Abroad, please complete Form DS-2029 (PDF 62 KB), Application for Consular Report of Birth Abroad.  Then schedule an appointment for the service, and bring payment for the appropriate fee, along with the following supporting documents:

  1. Child’s Portuguese Birth Certificate.  This is the Portuguese birth certificate issued by local authorities on request.  This document must show the biological parents’ names.   Please bring the original document.
  2. Declaration from the hospital.
  3. Evidence of Parents’ Citizenship and Identity.Your current passport is the preferred form of proof.   A U.S. birth certificate or naturalization certificate is also acceptable in all cases we need originals.
  4. For married parents, a marriage certificate. If your certificate is in a language other than English or Portuguese, a certified translation must be provided. Please bring the original document.
  5. For parents with prior marriages, we require divorce decrees, annulments, or death certificates showing that the marriages have ended, legally speaking.  If your document is in a language other than English or Portuguese, a certified translation must be provided.Please bring the original.
  6. Proof of the U.S. citizen parent’s physical presence in the U.S.Examples of acceptable primary evidence of this physical presence include:  Original school transcripts, records of military service showing nature of discharge (if any), Social Security income statements, and employment records.  Please submit original statements rather than copies of originals.  Secondary evidence might include:  income tax returns filed in the U.S., utility bills, medical records, former/current passports with stamps, airline ticket stubs, credit card bills, or notarized affidavits from former/current employers. The amount of time you must demonstrate that you resided in the U.S. to transmit citizenship to your child will depend on your marital status and if only one or both parents are U.S. citizens. More information can be found here at travel.state.gov/Please bring all original documents.
  7. If the parents are not married or if the unmarried U.S. citizen father is not present on the day of the application, we need a notarized affidavit of parentage, physical presence, and financial support from the father.  Please fill out the DS-5507 Affidavit of Parentage and Physical Presence (PDF 36 KB).
  8. For unmarried U.S. citizen fathers, we also require a legal statement recognizing paternity and a legal statement regarding custody.  Please bring the original documents.
  9. If you also wish to apply for your child’s first passport, please also bring the forms outlined here.
  10. To apply for your child’s Social Security number, please also complete an SS-5 Application for Social Security Card (PDF 132 KB).  Further general information on this subject and the application form can be found on the main website for the Social Security Administration.

Please remember to bring all required documentation with you to your appointment.   If you do not bring all of the required forms and supporting documentation, you may be required to reschedule your appointment and there will be a delay in processing your case.

If you are over the age of 18, were born to a U.S. citizen parent or parents, and believe that you have a claim to U.S. citizenship, please review this website for more information on U.S. nationality law.

To renounce U.S. citizenship, you must perform a series of actions voluntarily and with intent to relinquish U.S. citizenship.  The basic nature and elements of a renunciation are outlined here at travel.state.gov/.

U.S. citizens cannot effectively renounce their citizenship by mail, through an agent, or while in the United States because of the provisions of section 349(a)(5) of the Immigration and Nationality Act.  All renunciations and other recognitions of loss of nationality for U.S. citizens in Portugal are processed at the U.S. Embassy in Lisbon, Portugal.

Email conslisbon@state.gov to arrange for an appointment, and for more information on the required documentation.