public ByteArrayOutputStream getFilledPdf(Person person) throws IOException, DocumentException {
      InputStream istream = getClass().getResourceAsStream(SANTANDER_APPLICATION_PDF_PATH);
      PdfReader reader = new PdfReader(istream);
      reader.getAcroForm().remove(PdfName.SIGFLAGS);
      reader.selectPages("1,2");
      ByteArrayOutputStream output = new ByteArrayOutputStream();
      PdfStamper stamper = new PdfStamper(reader, output);
      form = stamper.getAcroFields();

      setField("topmostSubform[0].Page1[0].Nomecompleto[0]", person.getName());
      String documentIdNumber = person.getDocumentIdNumber();
      if (person.getIdDocumentType().equals(IDDocumentType.CITIZEN_CARD)
          || person.getIdDocumentType().equals(IDDocumentType.IDENTITY_CARD)) {
        setField("topmostSubform[0].Page1[0].NumBICartaoCidadaooutro[0]", documentIdNumber);
        setField(
            "topmostSubform[0].Page1[0].Checkdigit[0]",
            person.getIdentificationDocumentSeriesNumberValue());
      } else {
        setField("topmostSubform[0].Page1[0].Outrotipodocidentificacao[0]", documentIdNumber);
      }

      YearMonthDay emissionDate = person.getEmissionDateOfDocumentIdYearMonthDay();
      if (emissionDate != null) {
        setField(
            "topmostSubform[0].Page1[0].Dataemissao[0]",
            emissionDate.toString(DateTimeFormat.forPattern("dd/MM/yyyy")));
      }
      setField(
          "topmostSubform[0].Page1[0].Datavalidade[0]",
          person
              .getExpirationDateOfDocumentIdYearMonthDay()
              .toString(DateTimeFormat.forPattern("dd/MM/yyyy")));
      setField("topmostSubform[0].Page1[0].NIF[0]", person.getSocialSecurityNumber());
      setField(
          "topmostSubform[0].Page1[0].Nacionalidade[0]",
          person.getCountryOfBirth().getCountryNationality().toString());
      setField(
          "topmostSubform[0].Page1[0].Datanascimento[0]",
          person.getDateOfBirthYearMonthDay().toString(DateTimeFormat.forPattern("dd/MM/yyyy")));
      YearMonthDay dateOfBirthYearMonthDay = person.getDateOfBirthYearMonthDay();
      Period periodBetween = new Period(dateOfBirthYearMonthDay, new YearMonthDay());
      setField(
          "topmostSubform[0].Page1[0].Idadeactual[0]",
          String.valueOf(periodBetween.get(DurationFieldType.years())));
      if (person.isFemale()) {
        setField("topmostSubform[0].Page1[0].Sexo[0]", "F"); // female
      } else if (person.isMale()) {
        setField("topmostSubform[0].Page1[0].Sexo[0]", "M"); // male
      }

      switch (person.getMaritalStatus()) {
        case CIVIL_UNION:
          setField("topmostSubform[0].Page1[0].Uniaofacto[0]", "1");
          break;
        case DIVORCED:
          setField("topmostSubform[0].Page1[0].Divorciado[0]", "1");
          break;
        case MARRIED:
          setField("topmostSubform[0].Page1[0].Casado[0]", "1");
          break;
        case SEPARATED:
          setField("topmostSubform[0].Page1[0].Separado[0]", "1");
          break;
        case SINGLE:
          setField("topmostSubform[0].Page1[0].Solteiro[0]", "1");
          break;
        case WIDOWER:
          setField("topmostSubform[0].Page1[0].Viuvo[0]", "1");
          break;
      }
      setField("topmostSubform[0].Page1[0].Telemovel[0]", person.getDefaultMobilePhoneNumber());
      setField("topmostSubform[0].Page1[0].E-mail[0]", getMail(person));
      setField("topmostSubform[0].Page1[0].Moradaprincipal[0]", person.getAddress());
      setField("topmostSubform[0].Page1[0].localidade[0]", person.getAreaOfAreaCode());
      String postalCode = person.getPostalCode();
      int dashIndex = postalCode.indexOf('-');
      setField("topmostSubform[0].Page1[0].CodPostal[0]", postalCode.substring(0, 4));
      String last3Numbers = person.getPostalCode().substring(dashIndex + 1, dashIndex + 4);
      setField("topmostSubform[0].Page1[0].ExtensaoCodPostal[0]", last3Numbers);

      setField(
          "topmostSubform[0].Page1[0].Nacionalidade[0]",
          person.getCountryOfBirth().getCountryNationality().toString());
      setField(
          "topmostSubform[0].Page1[0].Nacionalidade[0]",
          person.getCountryOfBirth().getCountryNationality().toString());

      stamper.setFormFlattening(true);
      stamper.close();
      return output;
    }