code: private boolean checkDkVatId(final String pvatId) {
      final int sum = (pvatId.charAt(2) - '0') * 2 + (pvatId.charAt(3) - '0') * 7
          + (pvatId.charAt(4) - '0') * 6 + (pvatId.charAt(5) - '0') * 5 + (pvatId.charAt(6) - '0') * 4
          + (pvatId.charAt(7) - '0') * 3 + (pvatId.charAt(8) - '0') * 2 + pvatId.charAt(9) - '0';
      return sum % MODULO_11 == 0;
    }
docs: check the VAT identification number, country version for Denmark.
  
  @param pvatId vat id to check
  @return true if checksum is ok