def processValidExpDate(expDate, serverMode):
        r"""The ValidExpDate service checks the expiration date to ensure it is valid.   

        Args:    
            expDate (str): The expiration date of the credit card to verify in MMYY format. |br| 
            serverMode (str): Valid values are: PRODUCTION, UAT. |br| 
        Returns:
           TransactionXMLParser. Will populated using XML response.   
    
        Raises:
           Exception, For all type of exceptions    
        """

        if serverMode == "UAT":
            domain = ConstantResources.UAT_SERVER_URL
        else:
            domain = ConstantResources.PRODUCTION_SERVER_URL

        paramStr = {"ExpDate": expDate}
        response = ConnectionHandler.sendHttpPostRequest(
            paramStr, domain, '/transactservices.svc/ValidExpDate')

        if isinstance(response, Exception):
            return response
        elif response is not None and response != "":
            validationResponse = TransactionXMLParser.getValidateExpDateResponse(
                response)
            return validationResponse
        else:
            return None
    def processValidExpDate(expDate, serverMode):   
        r"""The ValidExpDate service checks the expiration date to ensure it is valid.   

        Args:    
            expDate (str): The expiration date of the credit card to verify in MMYY format. |br| 
            serverMode (str): Valid values are: PRODUCTION, UAT. |br| 
        Returns:
           TransactionXMLParser. Will populated using XML response.   
    
        Raises:
           Exception, For all type of exceptions    
        """

        if serverMode == "UAT":
            domain = ConstantResources.UAT_SERVER_URL
        else:
            domain = ConstantResources.PRODUCTION_SERVER_URL
            
        paramStr = {
                    "ExpDate" : expDate
        }
        response = ConnectionHandler.sendHttpPostRequest(paramStr, domain, '/transactservices.svc/ValidExpDate')
        
        if isinstance(response, Exception):
            return response
        elif response is not None and response != "":
            validationResponse = TransactionXMLParser.getValidateExpDateResponse(response)
            return validationResponse;
        else:
            return None