I had purchased too many products via Online and had encouraged many others to do so. With the passage of time I had experienced much of the things which helped me as well as others Happy. In this review I want to give you a few TIPS regarding Online shopping-
1) First you should have awareness regarding payment mode as unsecured mode may make a lose for you, try using your own device while payment(mobile, pc, tablet, etc.), also do not use open passwords for site and cautiously save Card Details.
2) MOST IMPORTANT make video of unboxing the device after you received your package as it will give a proof of something misshapping.
3) Always try to purchase from renowned Websites like Flipkart, Amazon, Jabong, Myntra, etc. I personally don not prefer ebay, Homeshop18, Shopclues, etc.
4) Always purchase with vendor having higher rating and star AND DO check there negative review, this will let you answer your question more clearly.
5) I had purchased many products from PAYTM as it gives huge cashbacks. But few categories I think should not be perchased from PAYTM are Perosonal care like deos, shampoos, etc as they are not original ones, Cheap footwares, clothing, grocery should not be perchased. You can purchase Electronic items from there.