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Hi nurcanb61753314,

The best example is your own code. So I have included some suggestions in it.

Please note something John123 said: the result is JSON, not XML

<cfscript>
wsURL = 'http://185.198.197.162/vknsorgulama/getall/dogrulama?vkn=18644905568&durum=2';
Ad= 'GÜNGÖR';
Soyad= 'YILMAZ';
BabaAdi= 'MEMET';
VergiDairesiAdi= 'KALEKAPI';
VergiDairesiKodu= '007252';
VKN= '9690365396';
Unvan= 'null';
</cfscript>

<cfoutput>
<cfsavecontent variable="requestXML"><?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
    <soapenv:Header/>
    
<!-- 
     The function (ws operation) name here is nameOfWSOperation. 
     Its argument, named 'VKN', is a complex type. 
     The element VKN has sub-elements VKN, Ad, Soyad and VergiDairesiAdi
 -->
    <soapenv:Body>
          <ws:nameOfWSOperation soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
            <ws:VKN>
			<ws:VKN>#VKN#</ws:VKN>
			<!--Optional:-->
			<ws:Ad>#Ad#</ws:Ad>
			<!--Optional:-->
			<ws:Soyad>#Soyad#</ws:Soyad>
			<ws:VergiDairesiAdi>#VergiDairesiAdi#</ws:VergiDairesiAdi>
			</ws:VKN>
          </ws:nameOfWSOperation>
    </soapenv:Body>
</soapenv:Envelope>
</cfsavecontent>

</cfoutput>



<cfhttp url = "#wsURL#" method = "post" result = "res">
<cfhttpparam type="header" name="content-type" value="text/xml">
<cfhttpparam type="header" name="SOAPAction" value="http://tempuri.org/DisKullaniciKimlikDogrula2">
<cfhttpparam type="header" name="content-length" value="#len(trim(requestXML))#">
<cfhttpparam type="header" name="charset" value="utf-8">
<cfhttpparam type="header" name="TE" value="deflate;q=0">
<cfhttpparam type="xml" name="message" value="#trim(requestXML)#">
</cfhttp>

<cfset VKNResult = trim(res.FileContent)>

<!--- Verify whether the WS result is of JSON type. If so, convert to struct. --->
<cfif isJSON(VKNResult)>
	<cfset wsResultStruct = deserializeJSON(VKNResult)>
	
	<cfdump var="#wsResultStruct#">
</cfif>
<!---<cfdump var="#res#">--->