code: private boolean checkBeVatId(final String pvatId) {
      final int numberPart = Integer.parseInt(pvatId.substring(2, 10));
      final int checkSum = Integer.parseInt(pvatId.substring(10));
      final int calculatedCheckSumBe = MODULO_97 - numberPart % MODULO_97;
      return checkSum == calculatedCheckSumBe;
    }
docs: check the VAT identification number, country version for Belgium.
  
  @param pvatId vat id to check
  @return true if checksum is ok