For WSIF Access Action configuration details, See configuringHTMLcon.html#configuringHTMLcon.
<forward name="doubleClick" contextRelative="true" path="/btt/html/doubleClickError.jsp"/>
<btt:form action="/creditcardprocess">Then define the Struts configuration file accordingly:
<action name="creditCardForm" path="/creditcardprocess" className="com.ibm.btt.struts.config.BTTWSIFActionMapping" type="com.ibm.btt.struts.actions.WSIFAction" input="/creditCardConfirmationPage.jsp" invokerId="creditcardprocessinvoker">