I have magento website and i want to push Order Line items multplal to Authorize.net order information. At the moment magento does not support to push order line items when order place, but i want this for client. So i did tried to push order items but i got only one item with order receipt even i did to send more than one order line items with order. So i believe there are some post data format issue. I did tried below way : $request is payment post data prepare request using php code. I am able to send one order line item with below : $request->XLineItem = "item1<|>golf balls<|><|>2<|>18.95<|>Y"; I did tried to push more than one Order Line items than it's not support within my code and override with other items. I did tried to combaine items using "&", but not working like below. $request->XLineItem = "item1<|>golf balls<|><|>2<|>18.95<|>Y&item2<|>golf balls<|><|>2<|>18.95<|>Y&item3<|>golf balls<|><|>2<|>18.95<|>Y"; But not working. Is there any json format require ? Is there any HTML form for posting data with Order Line items format ? Can you please guide me as soon as possible?