I have observed many developers do mistakes while integrating PayPal – Website Payment Standards. It may looks like correct and there will be everything working as well but if you have not integrated it well then there are few chance of data integrity problems. Yes ! you have to be very careful and wise while integrating PayPal – Website Payment Standards. If you are a developer and worked or working to integrate PayPal Website Payment Standards in your E-commerce application, project or any other assignments then you should refer the flow I have designed. It has some clear indication of what should be done at what stages. This is for developers and not for normal users.
Initially, I have prepared this for my development team at MULTIDOTS to make sure every integration we do must be secure, stable and well integrated then I thought I should make it open for everyone for their knowledge.