I have a paypal business account and selling digital goods (through e-junkie.com) instant download against payment on site, Recently I have faced spam buyers, Help me how to setup only paypal verified buyer will be enable to buy my site goods?
Doing manual sales and checking manually that your potential buyers are verified. Make sure to put a statement that makes clear buyers will need to provide a verified account to complete an order.
I have run online store, that's not possible for me, check every sales manually, is there any option in paypal or e-jukie.com?
No, there isn't. The benefit of the automated processing is that it is fast but you will need to give up several layers of protection. In the end, it depends on what is important to you, fast fulliment or fraud protection. You cannot have both with the basic Paypal framework. However, if you are in the US, you can opt for the Website Payment Pro service which has Fraud protection https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-pro-feature-list-outside#fraud
I also have seen this thing: http://solidphp.com/products/m3verify/index.php I don't know that it would do what you are looking for but, if you are non-US, it may be a loose alternative to Payments Pro.
what i will suggest you is manaully reveiw all the payments... and if you think a payment is made by frauds then you can refund the payment in 2 sec.... refunding is the best option then facing a chargeback or reversal.... because if too many reversal and chargeback made from your e-junkie account then i am sure they will close your account... o its better you manually review each payment and refund if suspecious payment...