code: public Response deleteDeptUser(String CorpNum) throws PopbillException{
  		if (CorpNum == null || CorpNum.isEmpty())
  			throw new PopbillException(-99999999, "연동회원 사업자번호(CorpNum)가 입력되지 않았습니다.");
  		
  		return httppost("/HomeTax/Cashbill/DeptUser", CorpNum, null, null, "DELETE", Response.class);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.HTCashbillService#deleteDeptUser(java.lang.String)