PayPal callback API NO_SHIPPING_OPTION_DETAILS ignored

Question

I'm using the callback API to prevent someone selecting a non-UK shipping address. I've supplied a callback url, I've set CALLBACKVERSION to 61.0.

When I go into the sandbox and choose an address I know the callback page is being called as I've added code to email me the values submitted to it and the value returned to PayPal. For anything with a SHIPTOCOUNTRY that isn't GB the response is

METHOD=CallbackResponse&NO_SHIPPING_OPTION_DETAILS=1

I've also tried setting a fuller response in case it doesn't like some required field to be missing

METHOD=CallbackResponse&CURRENCYCODE=GBP&L_SHIPPINGOPTIONNAME0=Standard&L_SHIPPINGALABEL0=Standard&L_SHIPPINGAMOUNT0=2.95&L_SHIPPINGOPTIONISDEFAULT0=true&L_SHIPPINGOPTIONNAME1=Express&L_SHIPPINGALABEL1=Express&L_SHIPPINGAMOUNT1=5.95&L_SHIPPINGOPTIONISDEFAULT1=false&NO_SHIPPING_OPTION_DETAILS=1

But it's still allowing non-UK addresses and just using the shipping options set during the initial set up request.

Any suggestions on where I'm going wrong?

Answer 1

After opening a ticket as suggested by PayPal_Patrick the problem was that I was adding the callbackversion in the wrong place. The full response to reject a shipping address on callback is:

METHOD=CallbackResponse&NO_SHIPPING_OPTION_DETAILS=1&CALLBACKVERSION=61

Answer 2

There are different transaction ID's for Buyer and Seller accounts.

I think this might be an issue caused by the country associated with the buyer account being used. I'm going to reach out to the product team for Express Checkout and see if it is intended functionality or not - I don't believe it would be.

If you want to stay updated on the issue I would recommend creating a ticket to PayPal.com/mts, give me the ticket number, I'll grab it and keep you involved.