Hi Vinu, are you referring to the purchase ID you are passing in the API call? What you could do is also pass it in the dataFields section of the call and from there using a workflow triggered by that purchase, you could pull in the value in handlebars within the template you are sending to the customer. Our handlebars won't be able to access the top level "ID" value being passed, only if you pass it in the dataFields section of the call